Chiisana Koi no Melody

Childhood friends Eiji and Tatsumi, who doubted their sexuality, are just friends who have been together. One day, Eiji, who found out about Tatsumi’s “promise of marriage” to someone else since young, began having complicated thoughts… The spring time of life of adolescents boys.
(Source: BangAQUA & Moi_xryuscans)