My childhood friend Sakura, who lives next door, is a textbook NEET and shut-in. Her habitat: her room. Her equipment: the same shirt for 10 years. Her occupation: home security. Checking on Sakura's well-being and supplying her with food had become my daily routine. But then, I finally got a girlfriend! ...But then (tears) Sakura, who had changed drastically, attacked me! "Stop it! I have a girlfriend now!" Despite my resistance, I ended up merging with Sakura right after getting a girlfriend. This is bad! It feels too good! I love my girlfriend, but our compatibility is too good, I can't stop! My guilt towards her is increasing, but the number of used condoms keeps piling up at the same rate!