High School DxD Light Novel Series by Ichiei Ishibumi, Miyama-Zero, 石踏 一榮, みやま 零

It's finally time for the school trip to Kyoto. Pillow fights, midnight confessions...and it would be bad manners not to peek into the girls' bath, right? Issei is on cloud nine just thinking about it, but as soon as his class arrives, a brigade of monsters launches an attack, quickly turning an exciting excursion into a battlefield! It seems like a misunderstanding, but could there be more to all this than meets the eye?

With the school festival just around the corner, the members of the Occult Research Club have their hands full preparing. And if that wasn’t enough, their Rating Game with Sairaorg is fast approaching, too! Unfortunately, Rias and Issei have an argument that drives a wedge between the pair. Can they mend their relationship in time for the biggest fight of their lives? And will they even stand a chance against the impossibly powerful Sairaorg if they do?

The time has finally come. All of Issei's effort punching gods and heroes has paid off. He's been recommended for a promotion to a middle-class demon! Unfortunately, he has to take a test to seal the deal, and it bangs right up against his midterms! Now the poor pervert is studying twice as hard... moreThe time has finally come. All of Issei's effort punching gods and heroes has paid off. He's been recommended for a promotion to a middle-class demon! Unfortunately, he has to take a test to seal the deal, and it bangs right up against his midterms! Now the poor pervert is studying twice as hard. As if that wasn't trouble enough, Ophis, the Infinite Dragon and leader of the Khaos Brigade, shows up on Issei's doorstep asking to stay with him for a few days! It doesn't seem like the trouble will be letting up soon. Hopefully, Issei can make it out in one piece… less

イッセーを失い失意に暮れるグレモリー眷属だったが、状況は彼らを放っておいてはくれなかった。超巨大な魔物が冥界の都市に向けて進撃を開始したのだ。冥界の危機にグレモリー眷属は？　そしてイッセーの復活はっ？

大家好，我是赤龍帝兵藤一誠。我成功了！平日的努力得到認同，所以魔王賽拉芙露．利維坦陛下特別指名我，交付我任務！任務內容是參與特攝電影「魔法少女☆小利維」的演出？「惡魔的仇敵赤龍帝！我魔法少女小利維要消滅你！」……這是怎麼回事!?攝影工作開始之後，才發現魔物、光束、爆破都是來真的！不，這樣會死的。被各式各樣的事物搞得暈頭轉向，今天依然置身危機之中!!惡魔風格的校園奇幻戰鬥戀愛喜劇，瘋狂向前衝！

「我、我是第一次，請、請溫柔一點……」我，兵藤一誠完全陷入慌亂。因為全裸的朱乃學姊就躺在我身邊──這是怎麼回事!?發生什麼事了!?從冥界回來之後，迎接我們的是久違的輕鬆日常。但是如此平穩的生活立刻遭到破壞……神祕集團襲擊學校。這些傢伙到底是誰!!身為國王（#king）的莉雅絲不在，吉蒙里眷屬又該如何是好!?惡魔風格的校園奇幻戰鬥戀愛喜劇，拜託了勇氣！

「……一誠，就麻煩你讓我抱孫子了。」伊莉娜的爸爸一邊嚎啕大哭，一邊把手放在我的肩上這麼說。這、這個……就算突然被提起孫子什麼的……（汗）聖誕節將至，鎮上充滿歡欣雀躍的氛圍。就在這樣的日子，發生了教會幹部接連遭受襲擊的事件，打破了這一片平靜──而接下來將遭到襲擊的竟是伊莉娜的爸爸！看來，這一連串事件的起因，似乎是過去發生在駒王町的一場悲劇……衝擊性的校園奇幻戰鬥戀愛喜劇，終於要進入寒假啦！