Sunroom ni Te – Takemiya Keiko

“In December of 1970 Takemiya published a short story, “In the Sunroom” (in Bessatsu Shojo Komikku) which is possibly the first shonen-ai manga published and contains the earliest known male-male kiss in shōjo manga.

The manga volume consists of five shorter stories:

– Sunroom Nite (In the Sunroom, 1970)
– Hohoemu Shounen (The Laughing Boy, 1972)
– 20 no Hiru to Yoru (20 Days and Nights, 1973)
– Star! (1974)
– Mister no Kotori (The Mr.’s Baby Bird, 1975)” 

A story of happy childhood innocence and powerful, inescapable desires.

A highly emotional and dramatic historical milestone in manga.

(source: http://www.mangahome.com)