Mao happens to meet her senior, Kotaro, whom she liked in her school days, and they start going out. Kotaro looks scary, but he's a kind and good person (although when he's angry, he turns into a delinquent). There's no way he has any worries... well, just one thing. She can't help but feel like he's not serious about having sex with her. Maybe she's not his true love? Well, that's true, but why would he, who is handsome, kind, and cool, be serious about a plain and ordinary girl like me. But she doesn't want to break up!! She finally got to go out with him!! So she consulted her friend, who told her, "Aphrodisiac is the only option!" and she decided to do it. Even if she's not his true love, she approaches Kotaro with this, thinking, "I was careful not to ruin my cute girlfriend, so I held back... Did you really think I'd end up giving him an aphrodisiac and get away with it for free?" Even though she realizes that she's stepped on the tiger's tail, it seems to be too late. In stark contrast to the usual gentle sex, he violently crushed in her arms...