The Fantasyland Son-in-Law, From the Start Married into Suzunaan

If I'd known I could become a live-in son-in-law in Gensokyo, I would have...

Wait, that's actually a good thing!?

Zhong Yu, a Touhou fan, accidentally gets spirited away to Gensokyo before the Red Mist Incident. Fortunately, he is rescued by Motoori Kosuzu of Suzunaan, sparing him from certain death.

To repay Kosuzu and her family for saving him, Kosuzu's father makes Zhong Yu an offer...

P.S. The missing chapters were deleted for being too spicy. They're available in the reader group.