Evolving my comment from last week (“please don’t let this be a goodbye kiss and Haebom doesn’t disappear after this”) into: it feels like this will be the “last” time they have sex (at least for a while) and that Haebom will disappear again afterwards. Even Taesung said it feels like a dream and that everything will be gone/he’ll be alone when he wakes up (foreshadowing). That’s why he’s finally letting him kiss him now and soaking in every moment.
Evolving my comment from last week (“please don’t let this be a goodbye kiss and Haebom doesn’t disappear after this”) into: it feels like this will be the “last” time they have sex (at least for a while) and that Haebom will disappear again afterwards. Even Taesung said it feels like a dream and that everything will be gone/he’ll be alone when he wakes up (foreshadowing). That’s why he’s finally letting him kiss him now and soaking in every moment.