A Misdelivered Love Letter Has Me Trapped by the Wildest Boy in School

I accidentally handed my confession letter—meant for the upperclassman I've been crushing on—to Soma Tachibana, the biggest troublemaker in school! "Got your letter, safe and sound. As of today, you're my girlfriend." A one-sided claim on my heart, all born from the worst misunderstanding. And now, thanks to our parents' arrangements, I'm moving in under the same roof as him starting today...!? A dangerous, sweet cohabitation where I'm at his mercy at zero distance, at school and at home!