PGD813 — I believe in your sister-in-law.

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His respected brother and his sister-in-law Yu are his respectful sister. We ended up living together with the two happy people for a short period of time, and I was having a happy life. But what's going on with my sister-in-law is a bit weird. Suspicious visitors act like they're hiding something... There's no way a sister-in-law could have an affair. I decided to start moving to protect the peace of this house. I believe in your sister-in-law... The first in the new drama series where you're cuckolded in earnest!