This strip is very, very weird, lol.
Sheryl: What's the matter, Ranka-chan?
Ranka: Well...it's already Valentine's day tomorrow and I haven't decided (on who to ask out)
Sheryl: Valentines...yes, I've heard about that before. What do you do exactly on that day anyway?
Ranka: Eeeeehh? Sheryl-san, you don't know about Valentine's day?!
(Now this is where it gets all random)
Alto: I'm home---! Eh? You're not here yet? (referring to Sheryl) Sure is late.
Alto: What's this....?
Note: I won't be home for a little while. -Sheryl
Alto: What the--? (more of like, "why" actually, heh)