Ex-lovers become brothers and sisters from parents’ remarriage ?!
”Kono Light Novel ga Sugoi!2021” Ranked 5th in Bunko format The most recommended Rom-Com novel finally gets Animed!

A certain boy and girl in middle school became lovers, flirted with each other, disagreed on trivial things, became more frequently irritated with each other rather than excited… and ended up breaking up on graduation. And so the two of them, Mizuto Irido and Yume Ayai, wound up meeting each other in the most unexpected fashion.

“Isn’t it obvious that I’m the elder brother?”
“Isn’t it obvious that I’m the elder sister?”

The children of the partner of their parents’ remarriage were ex-lovers?!

An agonizingly sweet and irresistible
“Kenka-ple (Always Fighting Couple)” romance!