My Childhood Friend, Who I Made a Promise To Spend the Future With, Dumped Me… But Ever Since I Started Dating a Beautiful Girl From School, My Childhood Friend has been Acting Strange

Native title: 将来の約束を交わした幼馴染が、俺の事を振ったのだが…俺が学園の美少女と付き合い始めてから、幼馴染の様子がおかしい