Kyonyuu ga Futari Inai to Bokki Shinai Danna no Tame ni Tomodachi wo Tsurete Kita Tsuma

Who knew that the key to saving Yuuto and Sae's troubled sex life was inviting a friend to join in!

(Source: Irodori Comics)

Notes:
- Includes three extra chapters.
- It has live-action AV adaptations: URE-093 (2023/04/25), URE-111 (2024/07/05) and URE-138 (2026/04/10).