Letter: X

X&Y

Yan Yuechu returned to his hometown to work and made new friends at his workplace. One day, he went to XY Escape Room and found himself deeply attracted to the proprietor, Xu Aiyou. However, that was when he started to experience strange escape room illusions. As Yan Yuechu got to know Xu Aiyou, more and more incidents started to happen around him and even his friends. In the process of solving the escape rooms and finding the mastermind behind all these events, he gradually found himself uncovering the truth behind his lost memories...

XL Joushi.

Running short of money, office lady Saki Watase is introduced to a part-time job where she's tasked with reviewing XL-size condoms. While receiving an escort home after a night of drinking, Saki's "demon" boss Keisuke Sudou notices that she's carrying a large quantity of condom. Once Saki explains her circumstances, Keisuke reveals that he is XL-size. A romance between the two thus begins.