I witnessed firsthand the shocking one-night forbidden wife-swapping experience that unfolded during a hot spring trip! Four close friends since university days shook up their stagnant married lives with this impactful night. The moment the friend's wife, Jun, suddenly suggested, 'Shall we try swapping?', the atmosphere shifted dramatically. The protagonist's initial turmoil, mixed with inner joy, is portrayed with striking realism. The background of a long relationship with his wife, Shiori, since student days, leading to a routine sex life and recent avoidance of even physical touch, adds depth to this decision. The setting that the friend couple was also dissatisfied with their current sex life creates a psychological game where all four become accomplices.

As they drink and chat in the tatami room of the hot spring inn, the rising tension and excitement are palpable from the screen. The camerawork is skillful, capturing subtle changes in expressions and gestures, with detailed psychological depictions. In the scenes where clothes are removed, the mix of confusion and anticipation at seeing each other's bodies for the first time creates a breathtaking sense of realism. Particularly in the moments where Shiori pairs with the friend and the protagonist with Jun, the dramatic shift in relationships draws viewers in completely. The sorrow of couples who love each other but are stuck in a rut, and the peril of engaging in forbidden acts, are masterfully expressed.

The self-reassurance of 'just for today' symbolically depicts the wavering emotions between guilt and liberation. The acting is natural, with an amateurish feel that enhances authenticity, making viewers' hearts race along. In the final scene, the complex expressions of the four returning to daily life after the night are memorable, leaving a lasting impression. Overall, this is an outstanding work that elevates deep social themes about marital relationships into entertainment. For couples contemplating breaking out of a rut, it might offer stimulating insights?