Honestly, the only good option here is Erika. Sachi has a horrible personality, she only thinks about herself and is very obnoxious most of the time, and how the fuck does she suddenly like him romanticaly when they've been siblings their whole lives, japs are weird man. And Hiro is even worse...
@gennoson Yes there is a novel, just you wait for her to appear and you will see how more amazing she is compared to the other females
@Escanor935 From up to what I read, there is no ecchi harem, the story gets very good as it progresses though the novel is just one volume ahead of the manga
Very bad manga tbh, doesn't have any sort of plot, those boobs are clearly oversized and no one likes NTR, this only relies on people liking oversized boobs. Very unappealing 3/10