Issei Saegusa is a young man who met Touru Arochi, a brusque transfer student, during his senior year of high school. After a series of twists and turns, the two are accepted into the same university. The morning of the entrance ceremony arrives with great anticipation. Although Issei wants to spend more time with Touru, he doesn't want to neglect his studies, either, because he is studying aerospace engineering. Toru, on the other hand, wants to improve his social skills in university. Then, he meets someone new right away...?

Upon entering high school, Osamu is meant to move into a new place to start living alone. However, when it burns to the ground three days before he is due to move, he ends up living at Takara's house, his step-uncle who is 12 years older than him. Unbeknownst to Takara, Osamu has been in love with him since they first met over ten years ago. Buoyed by his unexpected good fortune, Osamu confesses his love in the heat of the moment… An emotional love story under one roof between a high school boy, single-minded on first love, and an uncle who lives life at his own pace.

*“Our grade’s top scorer, an unapproachable guy, only opens up to me. That’s so friggin’ adorable!”* Saegusa is utterly bored of his high school life. Along comes Arochi Tooru, a guy with the brightest hair he’s ever seen, who transfers into his class. It’s an oddity already, for some guy with outrageous looks and a cold attitude, to transfer into a prep school. So he immediately draws the attention of everyone in his class. What’s more, he’s apparently a genius who cinches the top spot in their grade on their class exam. One day, Saegusa uses a common point of interest to approach Arochi, and the two start to become closer. But once they become friends, Arochi is actually really oblivious and cute! Saegusa just can’t take his eyes off this cutie!