His rule: No sexual relations until age 18! Her rule: No rules.
Free—spirited Yuri Hasegawa and straitlaced Keiichiro Katsuragi have fallen in love. But his elite political family—producing a line of prime ministers—does not allow male descendants to engage in any sexual relations until they are 18. Can the physically affectionate Yuri and rule—abiding Keiichiro keep their relationship strictly chaste?
Yuri’s attempts at having a normal romance with Keiichiro are thwarted on a daily basis. But now that they’re on their first overnight school trip together in the mountains, they end up in the same bed?!