I don't recall anything abt this story other than it's BL, and has lots of death. A particular scene from the novel just suddenly entered my mind and so I am looking for it. In the scene, MC and his bestfriend (I think) were in a ride... rollercoaster? And most probably they were in an amusement park instance. The bestfriend's seat had a useless seatbelt, so he was about to fall to death but MC kept hugging and tugging at him as bsf was slowly slipping down. Another was, though I'm not sure if it's the same story, but they both have survival and horror elements: MC was locked in a house or somewhere similar, and he had to find a key to escape while the house was filling up with water.