Alto didn't know who Sheryl was because he's an enka otaku
.
And this was a mediocre episode because of the insufficient amount of Sheryl.
Michel asks Klan out and she gets mad cause he wants her to introduce him to her blond friend
. Plus he remembers her name even though she only introduced them once. Michel got a little suspicious so he wants her friend to check out the pill for him as he's obviously wary about going through official channels.
P.S. My depression this week is much worse than usual because of the lack of Sheryl-sama screen time...