The Protagonist's Childhood Friend Is Coming on Strong to Me, a MobNew主人公の幼馴染が、脇役の俺にグイグイくる ; Shujinkou no Osananajimi ga, Wakiyaku no Ore ni Guigui Kuru ; 主角的青梅竹馬，對我這個配角來勢洶洶 ; 主角的青梅竹马，对我这个配角来势汹汹 ; Thanh Mai Trúc Mã Của Nhân Vật Chính Cứ Quấn Lấy Tôi, Một Nhân Vật Quần Chúng ; Bạn Thuở Nhỏ Của Nhân Vật Chính Không Hiểu Sao Cứ Tấn Công Một Vai Phụ Như Tôi

Ishii Kazuki’s life is destroyed after he becomes entangled in the romantic troubles of his friend Amada Teruhito, a boy who is absurdly popular like a romcom protagonist. The situation eventually drives Kazuki to take his own life. However, a miracle occurs, and he finds himself back at the morning of his high school entrance ceremony. In this second life, Kazuki decides to stay inconspicuous, avoid making friends, and live quietly. Yet for some reason, Amada’s childhood friend, the cool beauty called the “Ice Empress,” Hidaka Mikoto, starts approaching him.