Onsen de Himitsu no Otomari, 241-kaime

Hot Nights at the Hot Springs, Secret Trip No. 241
温泉で秘密のお泊り、241回目
Secret Sleepover 241

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About this title

Synopsis

Ishida and Kimura have been seeing each other for twenty years...but only once a month. They manage their work, and head for a hotel or ryokan where they can relax in a hot spring bath. No one, even their closest friends know about their relationship. This month, they are together again...for the 241st time. They soak themselves in hot bath, treat themselves with good food. "...Hey. Wanna come closer?" "Okay." This relaxing trip is what the mature couple live for. (Source: Kadokawa)

Publication notes

Onsen de Himitsu no Otomari, 241-kaime has been published digitally in English as Hot Nights at the Hot Springs, Secret Trip No. 241 by Kadokawa since September 5, 2025. The series has been sold as ebooks since July 15, 2022, and published in print by Kadokawa since November 17, 2025.