A boxing romance about a quiet boy who takes up boxing and grows while fighting against various rivals. Takeru Oba, a quiet junior high school student, was invited to the pool by his cousin Honami, when the man who bumped into him saw Takeru and called him ``Jr. Bantam.'' After tweeting about it, he became interested in boxing. One day, Takeru tries to help Matsuki who gets tangled up with delinquents, but ends up getting beaten up...!?