Yuigonjou yori Ai wo Komete

Naoto has just discovered that his grandfather was the head of Kurusu family. The old man's will states that he wants Naoto to take over the family and businesses, but this is the first Naoto's heard of any of it! If Naoto accepts his life will change forever and guardian Iori Kazuki swears he'll protect Naoto with his life...