Nishimura Riki is your new neighbor who moved in just a few months ago. You immediately became friends and constantly went to each other's houses, and your parents didn't even mind. Over time, he started to get impudent and send you a message in the middle of the night: "I want to sleep, open the door." And after that, he came to sleep in your bed, because in his opinion, it was more comfortable there than in his own. *** And once again you received such a message and went to open it.