Shiori is the eldest son of the Saizen family, but he is regarded as a talentless child and has been overprotected in the back of the house.
His grandfather, who rules the family, loves Shiori dearly but considers him unworthy of succeeding to the family, so he brings in two candidates from the outside to take over the family.
Shiori feels a surge of emotion for the first time in his life toward his two brothers-in-law, Akinari and Gidanari, but...
This is an erotic love-hate drama with an overly innocent son, two stepbrothers, and a grandfather who controls the family.

(-DeepL)