彼女の浮気を発見したら何故かヤンデレハーレムが出来た件 (Associated Names)

Sagami Kanata, a high school sophomore, witnesses his girlfriend, Manaka Saki, cheating on him at the end of a part-time job he was suddenly asked to do. They have been dating for two years. As their anniversary was coming up, he was hurt and on his way home in disappointment, he met a junior colleague,…