Honjo is a beautiful girl but very quiet, cold, and rarely talks to her classmates. She is secretly liked by her classmate Horiuchi, although she already has a boyfriend who is a university student. One time while lying asleep on the school sports field, Horiuchi was accidentally woken up by Honjo, which was also the first time she initiated a conversation with him. After going to the library, the two began to share personal stories with each other. Despite having a boyfriend, the distance makes it hard for Honjo to meet him often, so she hopes to experience intimacy with Horiuchi to understand what it's like. Fortunately, Horiuchi had been intimate with his ex-girlfriend two times, so he did not disappoint Honjo in her first experience. Even though they became close, Honjo still did not want anyone to know about their relationship and always acted coldly towards him in front of others. So disappointed, during the last time making love, he decided not to use a condom in the hope that Honjo's thoughts would change, but everything became even worse.