A Pool Date With You - Devilgram
"Ugh, look at all these normies..."
Belphegor tells MC that he had a lot of fun and it was worth keeping it a secret from the others. Just then, he disappears, much to MC's surprise. He sneaks up behind them to prank them. Afterwards, MC can ask for an apology kiss. Belphegor obliges and then asks if MC wants to kiss again but underwater. After they share another kiss, Belphegor reminds MC that they have the place to themselves and no one will come to bother them tonight.