Notes:

Source = http://danbooru.donmai.us/posts/918352 (site is NSFW)

Translation =
Comic: "…And you will deal with me, the great Vegeta, the strongest in the universe!"
Cirno's thought bubble: "So if Vegeta is the strongest… and I'm the strongest… then I must be Vegeta!"
Daiyousei: "What's up?"
(the next day)
Daiyousei: "What's wrong with your head!?"
Cirno: "Because I'm the strongest!"