Mikoto and Hikari go to the same cram school. When the two of them are studying together as usual after class at the cram school, Miko says, "Would you like to kiss?" A few days later, Miko confessed, "She's been masturbating lately because she's thinking about Hikari." While teaching Hikari how to masturbate, she tampered with her pussy and inserted her finger. The sex of the two people who are full for the first time pursues each other's comfort while being ○, and the act escalates.
