انیمه Zutto Suki Datta

Became friends since childhood Akaishi and Setsuna even up to high school until now. But Akaishi was not sensitive to Setsuna's feelings. Just wanting to stay with him, Setsuna will continue to keep her feelings to Akaishi, even have to sacrifice something for him in order to maintain their relationship.

(Source: Nekopoi and Has Been Translated and Edited)