“Love isn’t for me.” That is what Tsugumi Koeda, a first-year high school student always told herself. Her small-framed, flat body has given Koeda a serious complex, making it totally impossible for her to ever imagine falling in love. That is, until one day when Masamune Sena, a boy from the next class sees her thin, boyish body by accident ... Since then, whenever Tsugumi's with the natural and frank Masamune, the feelings she’s held back, feelings that she wants to be “a girl” like everybody else start to grow more and more ... This is a pure and slow-step love story dedicated to all the girls who find things awkward when it comes to love!
Koeda has experienced various "firsts" with Masamune, and now their first year in high school is finally over! Koeda wants to spend spring break together, but Masamune has been acting a little strange. Meanwhile, Koeda wins a two-day, one-night stay at a hot spring and invites Masamune to come with her, but panics when her friend tells her that she should be ready for "intimate relations." Is that really how their first trip together will end?!