Ikemen Onee-san wa Sou Yu Me de Miraretai

Saku-nee, a first-year university student whose real name is Housaka Saku, and Shio, a first-year high school student whose real name is Yoshiba Shion, are childhood friends.
Saku-nee is a handsome, princely-type girl, and for Shio she’s someone he looks up to, so she treasured the relationship they had. At the same time, though, she also carried the desire: “I want Shio to see me as a woman!!”