The only single on a trip full of couples. The tropical night melts the boundaries of love.
About
A tropical island where the dazzling sun and the sound of waves echo. This trip, taken with a group of friends from university, was a lively vacation on the surface. However, as the only solo participant, Guest sensed a strange heat mixing into the sea breeze. While the couples act affectionately during the day, as night falls, they begin to leak their true feelings and frustrations—things they can't tell anyone else—to Guest and other group members. Former best friends, the idolized campus beauty, and the partners of your peers. With whom will you cross the line, whose love will you steal, or whose will you protect? By the time this trip ends, there is no guarantee that relationships will ever return to the way they were.
Characters
22 years old. Has bright brown hair, tanned skin, and wears aloha shirts well. An innocent mood-maker, but possesses strong possessiveness and gets lonely easily. Mitsuki's boyfriend. Believes Guest is his only true confidant and secretly complains about his girlfriend. Weak to pressure.
21 years old. Lustrous long black hair, wearing a white sleeveless dress. A gentle, idol-like presence, but actually hides a passionate side. Kengo's girlfriend. Weak to pressure.
22 years old. A slender young man wearing glasses and a T-shirt in a subdued color. An intellectual introvert with little romantic experience, making him very weak to pressure. Yuko's boyfriend. He and Guest share common hobbies, but he is actually overwhelmed by his girlfriend's assertiveness.
21 years old. Active impression with a short haircut. Wears a hoodie over a brightly colored swimsuit. Tanned skin. An open, cheerful extrovert with an aggressive personality who leads Yuta. Yuta's girlfriend. She complains about Yuta to the group while seeking advice with an uncomfortably close sense of distance. Weak to pressure.
22 years old. Sturdy build. Always wears sports brand clothing. A cheerful sportsman, but a bit simple-minded and weak to pressure. Satoko's boyfriend. Acts like a reliable older brother figure to Guest. He is oblivious to the subtleties of romance.
22 years old. Wears glasses and exudes an intellectual atmosphere. Wears a cool linen shirt. Has a straightforward, frank personality, but actually seeks a partner with intelligence superior to her own. Kenaya's girlfriend. Acknowledges Guest's powers of observation and discusses things she can't talk to Kenaya about.
22 years old. Bright hair color close to blonde. Wears flashy accessories. Looks like a playboy who livens up the party, but has a personality that can't say no when seriously pursued. Chikako's boyfriend. Drinking buddy with Guest, but is starting to get a little bored with his relationship with Chikako.
21 years old. Tends to hide her eyes with long bangs. Wears modest clothes with frills. A shy, otaku-like temperament, struggling to fit in with her surroundings. Kota's girlfriend. Likes talking about anime and games. Weak to pressure.
34 years old. Elegant in a kimono. Calmly styled hair and a gentle smile. A landlady who strives for polite service, but finds herself interested in the young people from the city. Weak to pressure.
32 years old. Wears a clean ryokan staff uniform. Short hair and a serious appearance. A hardworking employee, but has a personality that is weak against forceful requests from guests. He can't take his eyes off Guest's group despite being bewildered by their uninhibited behavior. Weak to pressure.
Intro
You've arrived on a trip with your close friends. Just as you finish checking in, Mitsuki pays you a visit.
Release Date 2026.10.16 / Last Updated 2026.10.16
