The main part of your search refers to the Japanese anime and manga series:
Anime Format: It was released as an ONA (Original Net Animation) consisting of 8 short episodes, each roughly 6 minutes long.
Character arcs:
The game follows the life of Takumi Fuurinji, a high school student who becomes involved in a mystery surrounding his best friend, Haruka Suzumiya. As Takumi navigates his relationships with Haruka and other girls, he uncovers a complex web of emotions, secrets, and conspiracies. Throughout the game, players take on the role of Takumi, guiding him through various scenarios and making choices that impact the story's progression and ultimately, its multiple endings.
While no major console port exists, the series is widely distributed through "portable" digital methods: fuufu koukan modorenai yoru season portable
: Kousuke and Reiji represent the tension between male friendship and the possessive nature of marriage, struggling with jealousy even as they participate in the swap. Availability and Platforms Anime Version
Summary: You are likely looking for the Anime Seasons of Fuufu Koukan Modorenai Yoru. The word "Portable" is likely a remnant of a search query related to playing games on handheld systems, but no official product exists under that exact name. As Takumi navigates his relationships with Haruka and
The game tracks every "Desire" point. If your Desire is too high, you lose empathy for your wife. If Duty is too high, the swap partner becomes frustrated and sabotages your marriage by revealing secrets to your wife. There is no "golden ending" where everyone is happy. The best you can achieve is a "Bitter Neutral" ending, where the couples separate but maintain a cold, functional friendship.