Despite having been dumped by his girlfriend, Akiyama doesn't want to cancel their reservations to a famous onsen resort popular with couples. Deciding to go alone, he finds 3 sisters taking care of the inn. Later on, the sisters call his ex-girlfriend to come and patch things up with him.... However, will he still want to make up?

(Extra chapter in volume 3 remains untranslated).

This is a story about 2 childhood friends, Masato and Yuki, that reunite as teenagers. Masato is surprised to find that Yuki has become so cute, but even more surprised to realize that Yuki was, and still is, a guy. Yuki's affection for cross-dressing leaves Masato with feelings of discomfort and fright.