There’s No Freaking Way I’ll Be Your Lover! Unless… vol. 4 (Yuri manga)

Still fake-dating Satsuki, Renako finds herself caught in a dangerous love triangle between herself and the two starlets of Ashigaya High. As their conflict reaches its peak, and Satsuki’s true feelings towards Mai begin to emerge, Renako suggests a three-way battle to save her clique, her peaceful high-school life, and above all, her friends’ relationship!