母子交尾 ～只見路～ 渋谷果歩 (2017)
Kaho gave birth to her son when she was only 18 and raised him single-handedly against all odds. Now that her son is in college, he invites Kaho on a hot spring trip to Tadami Road during summer vacation. Kaho expects a fun, normal family trip, but her son has a specific confession and desire he has been waiting until adulthood to share with her.