The Bubble Love of the Mermaid, Vol. 1 (manga)

Oliva Osanz

Asana Amamizu, a student at Yotsuru Girls' Academy, has been bullied by her family ever since a red mark appeared on her wrist. So even when the school is abuzz with news about a handsome new Japanese teacher, Asana keeps her distance. That is, until an unexpected marriage proposal comes her way!