Hmm... this part of the comic is quite vague, so lemme try to translate the body language:

Neru: *Dere-dere~ over Neko-Miku*

Neko-Miku: "Holy shit... I've never seen this side of Neru before... kinda makes me sick..."

Teto: "Ah, Neru! Can't you see she's getting scared of you- a, ah- AH-CHOO~!!!"

Neko-Miku: "GAH! Allergic to cats, too!?"

Any of the mods can delete this post if it's too annoying.

Chibi Teto's hopes of getting a pet will not happen.

Neru - Teto epic fight please.

Actually, Neru's second meeting with Chibi-Miku involved her fawning over a cute little cat. They fawned over it together. Hilarity ensued.

Lemme rephrase then:

Neko-Miku: "Ewwww~ Neru being all dere-dere over me... I think I'm gonna be sick..."

Poor Teto...

Or maybe just "oww... that hurts..."?

The sound effects change from the third frame to the fourth frame, and judging by them, Neru's petting has gotten more harsh, she is over excited. Teto notice this and take Neko-Miku away from Neru. And, as expected, she is allergic to cats also.