ダンダダン [Dan Da Dan] Series by Yukinobu Tatsu, 龍幸伸

Momo Ayase strikes up an unusual friendship with her school's UFO fanatic, whom she nicknames "Okarun" because he has a name that is not to be said aloud. While Momo believes in spirits, she thinks aliens are nothing but nonsense. Her new friend, meanwhile, thinks the exact opposite. To settle matters, the two set out to prove each other wrong—Momo to a UFO hotspot and Okarun to a haunted tunnel! What unfolds next is a beautiful story of young love…and oddly horny aliens and spirits?

Okarun, a high school boy obsessed with supernatural phenomena, is cursed by Turbo Granny! To break the curse, Okarun and his classmate Momo Ayase challenge Turbo Granny to a high-stakes race. But Turbo Granny’s assassin, a bound spirit in the form of a giant crab, has other plans!

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!Okarun and Momo search for his precious family jewels, which he lost during his battle with Turbo Granny. Unfortunately, their classmate Aira has already found one, and it’s awakened spiritual powers within her. Around this same time, a strange woman in a red dress appears at their school and attacks them! Who is she, and what’s with her obsession with Aira? less

校内に現れたセルポ星人に虚空に閉じ込められ、再び男のシンボルを狙われるオカルン。だが絶対絶命のその時、恋する乙女・愛羅は、その身に宿るアクさらの炎の力を覚醒させた。モモとも合流し激戦を繰り広げるなか、セルポ星人は手ごまのドーバーデーモンとネッシーと合体する!?　度重なる危機に立ち向かい、力を合わせるオカルンたちは、セルポ星人を撃退できるか!?　不可思議バトルに甘酸っぱい恋模様の第四巻!!

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!Okarun and the gang are off to a hot springs town to investigate the mystery of Jiji’s family. But when they get there, a strange family in cahoots with the police starts causing trouble for them, and before the Okarun and the others can get to the bottom of the mystery, Momo ends up as an offering to the local god! less

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!The Kito clan tosses Okarun and the gang into an alternate-reality version of Jiji’s family home as an offering to the serpent god! Still imprisoned there is a former child sacrifice who goes on to possess the softhearted Jiji, and the two of them become the Evil Eye. When he then attacks Okarun and Momo, Okarun decides to take him on alone and sends Momo back aboveground to get help. There, Momo comes up with an ingenious plan to get rid of the giant serpent god, but can she pull it off on her own in time to save Jiji? less

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!Okarun and the others emerge victorious in their fight against the serpent god, but one lingering threat remains—the Evil Eye’s possession of Jiji. Even Grandma Seiko’s exorcism is of no use. To complicate matters further, whenever Jiji comes into contact with cold water, the Evil Eye regains control and attacks! Out of options, the group decides their best course of action is to watch over Jiji together until a proper exorcism can be performed—whenever that may be! less

Having looked on helplessly as Momo fought the Evil Eye, Okarun resolves to become stronger. To help with his training, Turbo Granny takes him, with Aira in tow, to the school’s music room, where they’re attacked by the portraits of composers hanging on the walls! But with some tips from Turbo Granny, Okarun is able to beat them, and he decides then and there to take on the Evil Eye!

A seemingly unbeatable kaiju is on the attack! Okarun hits on the idea of revisualizing the nanoskin that repaired Momo’s house into a form they can use to counterattack, but he lacks the visual abilities needed, so it’s Kinta Sakata—aka Erosuke—to the rescue! The nerd uses his vast knowledge of sci-fi to transform Momo’s house into…a giant Buddha robot?!

To avoid being late for school on Vamola’s first day, Momo takes the mysterious kaiju girl on a shortcut through some off-limits ruins. But the spell she performs with Vamola for protection doesn’t work, and she runs into the slit-mouthed woman who resides there! The two narrowly escape, and it’s only later that Momo realizes the real danger they were in. So why is it that for Momo’s own safety, Seiko is now forbidding her from leaving her room after 10 p.m. for the next week?!

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!Momo struggles to counter a sudden attack by alien clones, but through a temporary truce with her sworn enemy, the alien Serpo, she is able to persevere. However, her troubles are far from over—it’s now after 10 p.m.! In order to avoid the slit-mouthed woman Reiko Kashima, who is still very much on the hunt for her, Momo and Serpo must hide out overnight in a manga cafe. And when Momo finally returns home in the morning, she finds her friends are gravely injured and being treated by none other than Mr. Shrimp! less

A nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t... moreA nerd must fight powerful spirits and aliens all vying for the secret power of his “family jewel,” so who better to fight alongside him than his high school crush and a spirit granny?!Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!A gravely injured Okarun wakes up to an out-of-body experience! And when he answers Momo’s phone, he’s sucked through the telephone wires to where Seiko and Turbo Granny are in the middle of a battle. Thankfully, Turbo Granny is able to teach Okarun a technique for returning to his body that will also help in the impending alien invasion. Elsewhere, Momo and the others are undergoing their own training, but when they return home on the predicted date of the invasion, they find it’s already begun! less

It is revealed that Vamola, the girl found inside the kaiju suit, is actually a member of the once thriving Sumerian race from deep space! Unfortunately, her home world was attacked by the aliens presently targeting Earth, leaving her people scattered. She herself had been forced to plot her escape from the planet with a group of other women—including Banga, who found her as a child and raised her... moreIt is revealed that Vamola, the girl found inside the kaiju suit, is actually a member of the once thriving Sumerian race from deep space! Unfortunately, her home world was attacked by the aliens presently targeting Earth, leaving her people scattered. She herself had been forced to plot her escape from the planet with a group of other women—including Banga, who found her as a child and raised her. Now, having learned of Vamola’s past, Momo and the others rise to action, but the aliens they face are a formidable enemy. less

As Momo and the others fight desperately against the alien invaders, a recovering Okarun finally comes to and is able to join them. Unfortunately for him, it’s Tuesday, and that means one thing—the Evil Eye wants to fight! Thankfully, the Evil Eye’s focus is quickly diverted to the invaders when they get in the way of his match, and with his help, the team begins to crush the enemy. But suddenly, Vamola’s suit is snatched by an octopus-shaped invader, placing the team in dire straits!

Now that the alien invasion has been thwarted, Okarun and the others start a research club with the goal of finding his remaining family jewel. As they prepare to get their new club up and running, they can’t help but feel suspicious of their assigned advisor, Mr. Sanjome, whom they strangely have no previous memories of. Soon after, Okarun’s class rep reveals to him that ever since she picked up a gold ball, he’s looked like…a handsome vampire?!

Momo and Okarun task Turbo Granny with uncovering who picked up Okarun’s family jewel from the police station. She succeeds in infiltrating the station but is quickly thwarted by the station computers. Undaunted, the pair decide they’ll try again, but on their way home, they run into the Serpoian Rokuro, and it’s through his powers they’re able to identify the culprit! But why is it that guy?

呪われた、箱庭の様な小箱の中で、金の玉を持っていった人物・ズマと会ったモモ。ゲームのように展開する小箱の中、お菓子のアスレチックフィールドで、ズマが落とした金の玉を巡り、モモ達は超巨大コックに妨害されつつ、カエルと争奪戦を繰り広げる！　ズマと共闘し金の玉を取り戻せるか!?　一方、外の世界では、オカルンとズマの仲間が、ズマ＆モモの救出について激突！　果たして二人を小箱の中から救い出せるか!?

モモとズマがクリアしたゲームの正体は、凶悪な妖怪を閉じ込める“呪行李”だった！　解き放たれた悪魔のメルヘンカルタの能力で、ズマが乗っ憑られ大ピンチに。アンブレボーイ──最大限に引き出されたズマの力が、オカルン達を襲う！　その猛攻で、モモが大怪我を負い絶体絶命…かと思われたその時、6郎が駆けつける!!　さらに警官まで参戦して…。大混戦の状況下で、オカルンは金の玉を取り返し、アンブレボーイを倒せるのか!?

悪魔のメルヘンカルタは、ズマの気持ちの迷いに気付き“呪行李”から脱出を図る！　ターボババアは自分達も脱出するために外に待機させていた凛に舞の力を使って呪行李の外へ移動させるよう頼むが、舞が拒否!!　舞は凛をアイドルのような姿に変え、歌でみんなを救うよう指示し…!?　さらに、悪魔のメルヘンカルタが呪行李から脱出したため、中の世界が崩壊し始め…!?