Sunroom nite

In December of 1970, Takemiya published a short story, "Sunroom Nite", under the original title "Yuki to Hoshi to Tenshi to" (雪と星と天使と) in Bessatsu Shoujo Comic. It is possibly the first shounen-ai manga published and contains the earliest known male-male kiss in shoujo manga.

It's about a painter, his fiancée, and the mysterious ailing bishounen who crashes into their life. What does await them as death looms over the boy, and what does his smile hold?