Makemasen kara to Iiharu Kao no Ii Onnanoko wo, Zenryoku de Kuppuku Saseru Yuri no Ohanashi

Sara Kureha is the popular "big sister" of an all-girls academy. She has obtained her social position through her unflagging efforts. Rui Mareshino, who is widely recognized for her natural grace and beauty, offers Sara a certain game. Before the school's top-girl contest in two months' time, the two of them decide on a way to settle the matter beforehand....... “We should become lovers.” "Wha......?” The one who makes the other swoon is the girl who deserves to be at the top of the school! Now the two of them are in a secret relationship, as the mutual seduction battle begins...... Who will be the one to make the other surrender, body and soul? A fierce romantic comedy battle between two beautiful girls! (Source: Nico Nico Seiga, translated)