The bounds of Kaori's love for her husband are tested when he reveals that for his upcoming birthday, he'd like to act out a long-held fantasy of watching another man bang his wife in front of him. She doesn't understand what's so titillating about cuckoldry, but if it makes him happy...

(Source: Irodori Comics)

Notes:
- Originally a doujin series, and the first 3 chapters were later released as a tankoubon.
- A live-action AV adaptation (URE-116) will be released on 2024/09/26