Ichirou Kuga has suddenly found himself taking on the responsibility of caring for his two younger siblings after their father's untimely death. To make ends meet, Ichirou rents out rooms in the apartment complex he inherited and works full-time as a shoujo manga artist. However, his manga sales are low, his assistants have recently left, and deadlines are fast approaching. As stress threatens to overtake Ichirou, salvation comes in the form of an extremely competent novice artist, Shiori Goshiki, who becomes his new assistant. With her skills, they are able to tide over the difficult situation, and things begin looking up. But in a bizarre accident, a supernatural experience unfolds between Ichirou and Shirou, which leads her to declare them engaged. With this seemingly innocuous action upending his life, Ichirou now has to manage his new and peculiar relationship with the mysterious girl, all the while following his own passion and fulfilling the duties that rest on his shoulders.

There was once a man who was summoned to another world, and saved it. Of course, he became too popular there, and turned into an isekai-normie. However, that man fell into a "trap" and was forcibly returned to his original world. Moreover, he had to start over as a baby! This is the story of the way-too-fantastic ex-hero who lived as a gloomy high-schooler, as he gets summoned once again to that same other world in a very unexpected development!

Kyoutarou Ichikawa may look like a shy and reserved middle school student, but deep within his heart is a bloodthirsty killer. His ultimate desire is to see his classmate Anna Yamada's beautiful face writhing in pain before he ends her life. But this fantasy may never come to fruition, as Ichikawa starts to see an entirely different side to Yamada. Often seeking refuge in the library, Ichikawa frequently runs into Yamada. It is during these encounters that Ichikawa realizes his model classmate is actually an airhead who can never read the room. As they spend more time together, the boy cannot help but feel not only a sense of endearment toward the very girl he wishes to murder but also a desire to protect her at all costs. Is it possible that this sudden change in Ichikawa's perspective could lead to something more?

High schooler Ganta Nakami has trouble falling asleep most nights. As a result, he is irritable at school, always searching for an opportunity to find a secluded place to doze off. On the other hand, Isaki Magari is a free spirit who is well liked by her friends, but no one is aware of her sleep disorder. She makes use of the school's abandoned astronomy club observatory as her secret sleeping bunker when she needs to get some shut-eye. As fate would have it, Nakami finds Magari napping in the observatory. When Magari discovers that she and Nakami have something in common, she offers to share her secret sleeping spot with her fellow insomniac. As the two find warmth in each other's company, the struggles they face start to become easier to confront.