: Written by Utane Hayasaka with artistic supervision by Tadashi Midoro and Waffle. Format : Light novel / Literature (256 pages).
: Detailed, expressive art that emphasizes the physical chemistry and the overwhelming heat of the season. Target Audience
A year into his isolation, his life undergoes a sudden change when —sent by his three sons—arrive to look after him. Their selfless care and continuous presence gradually pull Kenzou out of his deep depression, restoring his physical energy and vitality.
The narrative is set during the peak of summer, using seasonal atmospheric elements to frame its story. Naisho no Kan-in -Manatsu no Asedaku Koubi-
A heavy emphasis on the physical toll of the heat and the intensity of the sexual acts.
However, the newfound health brings with it a complication. As Kenzou's vitality returns, so does his libido. He finds himself increasingly aware of his daughters-in-law not as family caretakers, but as women. He attempts to suppress his growing desires through masturbation, but the tension comes to a head when he is discovered in a compromising situation, shattering the fragile peace of the household. This sets the stage for a "secret" relationship that threatens to destroy the very fabric of the family.
(ナイショの姦淫～真夏の汗だく交尾～) is a Japanese digital media title, specifically categorized as an adult-oriented visual novel. Released by the developer SVN, the work is part of the "doujin" or independent software scene in Japan and was primarily designed for the Windows PC platform. Product Information and Specifications : Written by Utane Hayasaka with artistic supervision
The title was primarily distributed around 2022. Platform: Windows PC Format: Digital Download Classification: Adult Visual Novel (18+) Genre and Structural Elements
The game features complete voice acting for all primary characters. This enhances the immersion during both the dramatic storyline segments and the explicit adult scenes.
The use of traditional Japanese summer tropes (verandas, iced tea, fans) contrasted with "immoral" behavior. Target Audience A year into his isolation, his
――それは、ただの体温調節ではなかった。彩が「ナイショのカンイン」を使うとき、汗は情報の媒介となる。
The game made its initial debut in November 2022 with a widely circulated trial edition, followed shortly by the full commercial release. Specification Waffle Release Date November 18, 2022 (Trial) / December 2022 (Full) Platform Windows PC Resolution 1920x1080 Full HD Age Rating 18+ (Adults Only) Audio Fully Voiced Core Themes and Narrative Setting