https://www.dlsite.com/maniax-touch/work/=/product_id/RJ01168444.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_359145/

[Synopsis]

While dining with three friends, Rika expresses her dissatisfaction with her sex life with her husband.
Her friend Yui hears this and suggests introducing Rika to her partner, Ryota, a handsome host.
When Rika visits Ryota's house where she lives with Yui, she is surprised by his charm.
Ryota listens to Rika's troubles and the conversation takes an unexpected turn, leading to a sexual relationship.
Rika is surprised by this and initially refuses but Ryota and Yui begin to demonstrate their own relationship.
Misaki and Rika have no choice but to watch this unfold, but... (͠≖ ͜ʖ͠≖)

Sequel: /g/3155683/c48fd072c2/

Base +22, dirtyhairry +29, Fofotron +21