I Got Married to the Girl I Hate Most in Class (Manga) Vol. 1 - Amano Seiju

Archenemies Hojou Saito and Sakuramori Akane are notorious across their high school for their bitter rivalry. Every day is a new battleground, filled with constant bickering and fiery clashes. But everything changes when Saito’s domineering grandfather delivers a shocking ultimatum: marry his rival, or lose the family business to the dog! Reluctantly, Saito agrees, and to his surprise - so does Akane. Now, the two must navigate life as an unlikely couple, sharing a house, meals, and even a bed… without tearing each other apart! Can they keep their embarrassing marriage a secret from their classmates? And what could have possibly motivated Akane to agree to this arrangement in the first place?