Looks like Dark Souls 2 fanart.

The very first thing you do as Vaan in FF12 is kill rats. Old Dalan even calls you Vaan Ratsbane when you meet him.

That's THPS2

ぼっち　ざ　ろっく

ち　rather than ら And double consonant on rokku

Bocchi za rokku

Which apparently gets anglicized as Bocchi the Rock, the title of a manga.

Not sure what the deal is with あいがとう　instead of ありがとうthough. Unless it's a form of thank you I haven't encountered or just a typo.