Passionfruit

Interesting debut.

From the way she's acting this screams there's more going on behind the scenes.

Not quite sure what to make of the ending (might need to read it again), but it's a Most Excellent Debut by this artist, featuring an MC who proved himself A Man Of Culture (seems to be attracted to older women) and a Sexy Onee-san FMC, who just might have guided him through his "first time".

Simply Put, ..... "ME LIKE!"

A nice touch of foreshadowing in this one. When they go to get drinks, she gets the Passionfruit flavor because she likes “seasonal” things. This could be the author’s way of implying that she doesn’t want to settle down and enjoys the occasional hookup. The phone alert at the end doesn’t necessarily imply cheating (such as a partner calling) but could be a fail safe she uses in case the hookup went south.

It's likely she's cheating, but I don't think it deserves the tag since it's not definite and also it's the last panel.