After advancing to high school, ‘Kohhei Hirose’, who had been in love with his childhood friend but was rejected, encounters a small puppy on his way home on the first day of school. Coincidentally, the puppy turns out to be ‘Pisuke’, the beloved pet of the beautiful girl in the same class, ‘Haruka Hasuike’. Thanks to this encounter, Haruka befriends Kohhei, and she is the only one in their class who addresses him by his name. Kohhei, nursing a broken heart from being rejected by his childhood friend, slowly starts to regain his former cheerfulness through his interactions with Haruka.