I Just Realized That I’m in Love With My Fiance, but He Dotes on My Sister and Doesn’t Feel Anything for Me, so I’m Sure I’ll End up Heartbroken

Chloe’s fiancé Tobias has a younger sister, Celestia, who disappeared when she was a child. Chloe happened to find her while patrolling the orphanage, and the two were reunited. However, Chloe has given up all of her social activities, which she had been doing vigorously up until now.