"Jitterbug" from "S no Yuiitsu M no Zettai" 1 volume-complete by Rei Toma
Akane's mom died and she suddenly finds herself with a father and three brothers. This is the second story in the five oneshots of Toma Rei. I like all the stories that I can't decide which one I like best. She's good in bringing out the emotions from such a compressed time. That's why I think she'll fare well with a longer series like "Boku wa Kiss de Uso o Tsuku."