the main four + mettaton receiving a kiss on the corner of the mouth from their crush after a day of hanging out?

underimagines:

Sans:

…heh. Wow, he knew you were sweet, but he wasn’t expecting so much sugar. He wasn’t expecting you to just lay one on him like that. Don’t worry, he’s not mad though. Just…kind of out of it, for a little while. It takes him a few seconds to process, but after that he’s on cloud nine. He spends the rest of the day spouting the worst puns possible, all with a huge (genuine) grin on his face. Despite the fact that the puns drive Papyrus crazy, he can’t help but note how happy his brother looks.

Papyrus:

OH!! He’s fallen right into your trap!! You mastermind!! You fiend!! You devil!!! Well, now he has no choice!!! He, the Great Papyrus, will do you the honor of becoming your date-mate!!! …That is why you kissed him right?? Of course it was! Your feelings (& subsequently his feelings as well) are very obvious!!! Don’t think this has ended just yet date-mate, he’s still got a trick up his sleeve! It’s…HOLDING YOUR HAND!!!!

Undyne:

Ah. Fufufu, you sneaky little devil!! You totally got her, holy crap!! I hope you like noogies, because she’s giving you noogies. You might have caught her off-guard, but don’t count on doing it again!! She’s gonna get you back for this–with a couple hundred smooches of her own!!! …If that’s okay with you, that is.

Alphys:

…?? She just kinda stands there blankly for a minute, completely oblivious, before the realization just smacks into her like a train. Her entire face goes red & next thing you know she’s screaming internally like a stereotypical anime girl. All the while rambling about how ohmygod was that a kiss did you just kiss her she totally wasn’t prepared her breath probably smells & she didn’t even kiss you back ohmygod are you going to kiss again can you please???

Mettaton:

Oh! Goodness darling, if you wanted a kiss, you could have just asked. He quickly returns the favor, planting one on your cheek with as much glamour & pizzazz as he can muster. If you really wanted to dazzle him, darling, you would have aimed a little more to the left. No problem, though, you just need a little practice~.