Magnum Lily

Magnum Lily (マグナムリリィ) is a manga series 2017-2019 written and illustrated by Kube Toshihisa. It is serialized in Magazine Pocket and an Anime TV series 2020.

Plot
A 15-year-old high school girl named Yuri Hikaru meets a 19-year-old female boxer named Windy at a funfair, and she way to a women's boxing match and she saw a 23-year-old female boxer named Azusa and she see Windy as Azusa's boxing opponent on the boxing ring at round 4 Windy knock Azusa out in that fight on the ring when Yuri wants to become a boxer in order to fight Windy in the women's boxing match at 15 rounds and she end up going to a boxing gym when she fall in lesbian love with her by a kissing her on the lips.

Other Sources
MAL link||Magnum Lily