I Visited My In-Laws to Announce My Marriage and Ended Up Fucking My Girlfriend’s Little Sister Silly!

"Maybe it's because we're just compatible? ...or maybe brother-in-law is just amazing at this."

The protagonist visits his in-laws' house to announce his marriage with his girlfriend. There he sees his girlfriend's younger sister who he often used to take care of in the past, and she has grown up to be a lovely young lady.

After her older sister has fallen asleep, this sister-in-law comes on to the protagonist and they end up getting into a physical relationship...

(Source: DLsite)

Namespace	Tags
male	cheating, facesitting, netorare, sole male
female	anal, big breasts, hidden sex, leg lock, nakadashi, paizuri, pixie cut, rimjob, sister, sole female, tomboy
mixed	inseki
other	mosaic censorship