LOVE PRISON Vol.3 (TL Manga): The Sadistic Knight and the Indecent Vow

Natsu stopped touching me.
I don't want any other man to touch me, but the gap between us keeps growing. Then one day, a cheerful male transfer student named Shiraha appears in school and acts friendly toward me. Then, he suddenly tells me I'm cute, and attacks me when we're alone?!
"That loyal dog doesn't have what it takes to satisfy you, does he?" What could he mean?!