Mother's best friend

Koji is left to be left without his parents while he is on a trip. As the opposite sex, she finds a crush on her mother's best friend Miki, who came to check on her because she was worried on her own. I want to create memories of Miki and her adult life, whatever. With an evil determination, he breaks into the changing room and uses his underwear as a material for masturbation, but unfortunately he runs into Miki. However, instead of getting angry, Miki presses her heart against her, "You wanted to do something like this with me, right?"