Hentai Manga like Koisuru Okami Yuna: Tsuitachi Gentei Hitokumi Okami ga Yarashite Kureru Onsen Yado no Yoru.

Osananajimi de Koibito no Kanojo to Ecchi na Shitagi

Status: Finished
Genres: Hentai , Romance

Aki asked his childhood friend girlfriend Koharu to wear a set of sexy lingerie he found in her room, but by the time they got a good mood going, it was time to go to school. So they went to school with her still wearing it under her uniform. She was clearly feeling it because of that — even in school; So he brought her to the infirmary...

Miwaku no Onsen Yado

Status: Finished
Genres: Hentai

Note: Published in Comic Shigekiteki SQUIRT!! Vol. 55

Yokkyuu Fuman no Hitozuma wa Onsenyado de Hageshiku Hameru

Status: Finished
Genres: Hentai

Notes:
Originally serialized under the title Yokkyuu Fuman no Hitozuma wa Onsen Ryokan de Hageshiku Modaeru (欲求不満の人妻は温泉旅館で激しく悶える).
Split into 72 episodes on mobile reading platforms.
The first 9 chapters were previously given a tankoubon release as Hitozuma wa Onsenyado de Midara ni Hameru (人妻は温泉宿で淫らに交尾る).