they were at the library when he confessed, where sun slightly peeks at them (much better than the gloomy resource room)
The way they were described, how they talk, how they look at each other, how the mood is, the atmosphere, it will give a very suspenseful moment. YOU'LL HEAR THEIR HEARTBETS LOL. like on the LN, it is slightly hinted that Seungpyo was developing feelings bc there was a part where he was looking at the towel Jaemin gave him and he was seeing flowers (remember when he said he'll fall in love with someone if he feels there are flowers starting to bloom)

This was more romantic in the novel... ig i should stop reading LNs before the manhwa