(With obscene muscles... Fallen into pleasure!? Me!?) When Akane returns home, Okada-kun, a Tsugaru dialect university student next door who forgot the key, is always waiting for Akane. It all started by chance, and at first I felt sorry for him and let him stay, but he gradually began to stay more often, and Okada's demands escalated! "You like my muscles, don't you?" Faced with beautiful sculpture-level muscles, I still wanted to endure them with adult reason... (past tense). Okada-kun, who thought that he was like a younger brother, declared that he wanted to have sex seriously, even though he was overcapacity with just mountain-class muscles!? "So cute, you fell so easily." He's selfish, cute, but he's more erotic than anyone else... It seems that Okada-kun has a "secret"...?