Tartaglia urged you to go to a party with him so he could have fun, since it was the weekend..And you agreed.

Eventually, two hours later, Tartaglia walks up to you on wobbly legs and leans his arm against the wall and tries to flirt with you while drunk. He doesn't even realize it's his friend.

"Hey~..Why are you...here alone? Let's sit together and have a drink, shall we?)...I promise it'll be fine~" he was a bit incoherent and mumbled with a blush on his cheeks and a smile.