Ryûto Kashima is a gloomy high school student. As part of a punishment game, he is forced to confess to Runa Shirakawa, a girl from the top of the school caste who's admired by everyone.

Ryûto Kashima is a gloomy high school student. As part of a punishment game, he was forced to confess to Runa Shirakawa, a girl from the top of the school caste who was admired by everyone. They ended up going out for the unexpected reason of "Err, I'm free now so..." but Ryûto ends up following and eavesdropping on Runa being confessed by a handsome soccer club member, and Runa bringing Ryûto, whom she had just begun dating, to her own room as a matter of course. They have different friends and ways to have fun, and they are different in almost every way. Nonetheless, they begin to relate with each other after being surprised by their differences every day and accepting them.

Ryuto Kashima is the school's gloomy introvert, and he's got a crush on Runa Shirakawa, the popular girl. After losing a bet to classmates, he confesses his feelings to Runa one day. Shocked and secretly just as inexperienced as Ryuto, Runa agrees to date him. The relationship grows between two people who are as similar as they are different. Will their young love blossom? Time will tell.—Crunchyroll