Gogatsu no Hana wa Made Sakanai

Tsubaki is a well-liked and very rich high schooler whose mother usually works. One day while coming home from school, Tsubaki was shocked to find that his mother brought back her new boyfriend, Reiichi. Reiichi is a nice person, but he likes touching Tsubaki intimately, confusing the young and innocent Tsubaki. After Reiichi confesses to falling in love with Tsubaki, he becomes even more confused.