Tatsuya visited his aunt Mitsuki's house for the first time in a long while during his summer vacation. He couldn't help but be taken aback by Mitsuki's alluring body, which was different from his childhood memories. Mitsuki found his innocent reactions amusing and teased him relentlessly... That night, by chance, he witnessed his aunt and uncle's intimate moment. The next morning, as Tatsuya blushed recalling the previous night, Mitsuki confronted him, "You saw us last night, didn't you?"
