Miko and Hikari attend the same cram school. After class, as usual, they study together when Miko suddenly says, 'Let's try kissing?' and they kiss. Later, Miko confesses, 'I've been masturbating recently thinking about you.' While teaching Hikari how to masturbate, she plays with her vagina and inserts a finger. The two inexperienced individuals fumble through their sexual acts but pursue mutual pleasure, escalating their actions.
