Kami-sama No Iutoori (moegi Yuu) (Yaoi) manga
Thank, but it wrong. Its similiar. But only have 1 chapter. The tengu have 2 other sibling.
http://www.mangago.me/read-manga/tengujin/tr/41525/page/89/ ??
If it's this one, it's actually long series. The beginning of book is sequel that the MC reincarnates.
Its not either (⌒▽⌒)
If my memory doesn't mess up, the story goes like this
When the uke still a child, he used to met with the seme, and call him oniichan ( human form). He granpa told him dont play under the big tree because he can meet with tengu/spirit. I forgot the rest of story. Sorry for my bad english and my bad memory
Looking for yaoi or shounen ai.
Its supernatural, the boy (an uke) visited the big tree, and he met with tengu/god/spirit/crow (a seme). the Tengu was wait the uke for long time, and said something about destiny/marriage. I remember when they have sex under the tree the other tengu was watching ( the tengu's brother). Its oneshot or ongoing, because still 1 chapter. But the last page the mangaka make review about the other two tengu. Thank in advanced