-You and Sans surely met at Grillby’s or he bring you there , the point is that you two are popular in there. But the head-bunny lady at the table next to the entrance of the restaurant is surely jalous , she’ll be mean to you.

-You maybe engage the conversation and he kept going with lame joke and you match his humor without even trying , or he spot you sat to his usual spot at Grillby’s and sat at the chair next to you and most likely start the conversation with a pun like "Bar stools really know how to keep you grounded" or something.

-He enjoy talking with you a lot , the back-to-back pun can during for hours I’m not exaggerating it it. Grilby had to kick both of you out of his restaurant once.

-He’s rarely embarrassed by something it almost like impossible to do so. But this one time he going to remember his whole life , you on the other sid laughed nervously and for a first you didn’t had any comeback.

-He teleport away and left you alone at Grilby without any warning , after that he didn’t left his bedroom for days , even Papyrus got worried.

-Papyrus did everything to get him out of his bedroom , he tried too knock at his door , telling puns he found in a random book and knock at his door again with no success , so he call you out for help.

-At some point you manage to enter his bedroom by climbing up to his window outside , or you found the key of his room , or maybe you have hidden skill on picking locks. It doesn’t matter how you enter his room , you found him curled into a ball as he facing the wall , he said thing in a whisper it was inaudible but it seriously creep you out.

-You recomforted him with a hug from behind and some kiss at his temple down to his cheek. You still tease him about that one puns and did jokes about it.

-You still mad about the way he left you without warning and you made it clear , he surely won’t do that again.