Mint Chocolate, book 2
Mami Orikasa2021

Nanami is not thrilled. In fact, she's about at her wits' end. Her crush is
living in her house as her stepbrother, he keeps teasing her, and now he's in
the hospital?! Between unexpected guests, nursing the stubborn Kyouhei, and the
approach of Christmas, she just can't catch a break...Without a little bit of
Kyouhei's sweet chocolate, she just might break.