Boita Boine

Haine is a boyish tomboy highschool girl who wants her very own yuri harem. She gets confident after helping a girl on the first day of school, but standing in the way of her goal is Shizuka, another boyish highschool girl who's seen as a prince and steals girls' hearts without even trying! Haine's new goal is to defeat Shizuka and build her yuri harem!

(Source: Natalie, translated)