So, I Can't Play H Series by Pan Tachibana

One day, first-class Grim Reaper Lisara, for her own reasons, secretly enters the human world. After searching in vain for her target, Lisara is completely exhausted. That's when Ryosuke Kaga approaches her. To help Lisara out, he leads her out of the rain and to his cozy home, where he tells her, "I will do anything to help you." When Lisara hears that, she suddenly embraces Ryosuke and......?!

Top-class Grim Reaper Lisara sneaks into the human realm and forms a temporary contract with the (un?)lucky letch Ryosuke Kaga as she searches for a singular person, an individual who possesses great spiritual power. On the hunt at Ryosuke's school, Lisara encounters and rejects the popular president of the boxing club, Hikaru Tamano... moreTop-class Grim Reaper Lisara sneaks into the human realm and forms a temporary contract with the (un?)lucky letch Ryosuke Kaga as she searches for a singular person, an individual who possesses great spiritual power. On the hunt at Ryosuke's school, Lisara encounters and rejects the popular president of the boxing club, Hikaru Tamano. But the guy doesn't know how to take no for an answer! When he confronts the duo again, he knows about Lisara's circumstances for some reason, and his spirit energy is through the roof!! less

At Ryosuke's place, Lisara and now Qru have taken up residence. With steamy situations arising day in and day out, Ryosuke is constantly sapped of vigor, but for a lecherous loser like him, it's a sad and happy life at the same time... moreAt Ryosuke's place, Lisara and now Qru have taken up residence. With steamy situations arising day in and day out, Ryosuke is constantly sapped of vigor, but for a lecherous loser like him, it's a sad and happy life at the same time. And as if he had any more spirit energy to spare, Ryosuke is joined by the pinup model Iria, who's just transferred into his class! But is it true that she's actually a grim reaper?!An astounding battle of differences breaks out!Were test scores always determined by 'bust size'?! less

To commemorate the opening of the pool, Momozono Academy is holding its very own swimsuit contest! Aiming to crush the competition, Ryosuke and Lisara distribute sexy photos to whet the appetites of the student body. But Iria Fukumune suddenly transfers in, her sights set on bringing the boys to their knees with her ample, all-natural bosom, and--?!Is a sexy battle about to break out?!Which bathing beauty will stand at the top of the class?!

With victory in their sights, Ryosuke and Lisara are all ready to take on the swimsuit contest! But when Iria appears and proceeds to relentlessly sabotage her, Lisara's prospects look dim...until Ryosuke has an inspired idea that takes the competition in an unexpected direction... The over the top erotic comedy comes to an end!!Where exactly is this swimsuit competition headed...?!