74 Hours (KimMacau)

Macau and Kim, cousins united more by duty than affection, silently resent each other, held together only by family ties and Kim's relationship with Chay-Macau's best friend. During a summer vacation to the Theerapanyakul family's secluded private island, chaos unfolds when Tankhun, the family's eccentric wildcard, assigns everyone roommates, forcing Macau and Kim to share a room. Matters worsen when the family is mysteriously locked in their rooms with no internet or contact with the outside world. Isolated and stripped of distractions, their animosity slowly unravels, giving way to unexpected vulnerability. One accidental, intimate moment ignites confusion and stirs emotions neither of them is ready to face. As boundaries blur and feelings deepen, Kim and Macau must confront the growing connection that defies logic, loyalty, and their past. Torn between guilt and desire, they're left to question whether this bond is a fleeting mistake-or the beginning of something real.

The characters are from KinnPorsche the series by Daemi. It's fanfiction and not a translation.