Kitchen Princess Vol 7

From the Del Rey Manga edition

A new student has arrived at Seika Academy, and he's supposed to take Najika's place as spokesperson for the cooking school. Seiya is arrogant and bossy, and he cooks with a precision that is the exact opposite of Najika's almost magical style. It's hate at first sight, and there's a twist: Seiya looks exactly like Najika's lost love, Sora!

Source: Anime News Network Encyclopedia