In the Far North, a venerable senior with a hundred thousand years behind him (though his mental age is still that of a boy) gets bored of staying in the Frozen Forest and resolutely decides to take human form.
The naive (stupid) Xiao Feng gets sold off by someone, and is still counting the money for them!
Tang San, starved for affection, takes Xiao Feng as family ("A wife is family too.").
Xiao Feng: I thought of you as my big brother, but you want to sleep with me.
Tang San: A Feng, I like you.
Xiao Feng: But...
Tang San: A Feng, I love you.
Xiao Feng: I...
Tang San: A Feng, I want you.
Xiao Feng: You...
Without another word, Tang San kisses him.
Xiao Feng: Mmph, mmph...
PS:
1. The protagonist is not a weak, submissive type (he's only clueless around Tang San).
2. One-on-one, original protagonist x Tang San (the pairing cannot be split up, and their roles cannot be reversed).
3. This is fanfiction, so some original content is unavoidable.
4. Tang San and Xiao Wu are not a couple here. Xiao Wu is not bashed; they are true siblings, and Xiao Wu has another pairing.
5. The protagonist has an overpowered golden finger.
6. Updates are irregular.
Theme: Explore the continent, find a wife (are you sure?), and ascend to godhood together.