Looking for the name of a Japanese animation

Being better than master

Protagonist: Kaoru Hanabishi (はなびしかおる)

CV: Soichiro Hoshishi/Tongzuo

Kaoru and Aoi

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The protagonist of this work is a good old man. Studied at Ming University and joined the photography club. After the death of his father, he became the next generation heir of the Hanabishi Zaibatsu. Due to a conflict with his grandfather, the current head of Hanabishi, he chose to leave home and live alone in Tokyo. She and Aoi now live in the Sakuraba family's annex in Tokyo.

When he was young, he met Aoi due to the engagement between Hanabishi and Sakuraba, and they have many childhood memories. When they met for the last time, he entrusted Aoi with the key that his mother gave him for safekeeping, and made an appointment to get it back the next time they meet. After the head of the Hanabishi family passed away, his half-brother, in order to seize the position of head, put Aoi under house arrest and asked to be engaged to her. After learning about it, Xun went to the rescue on the day of the engagement. After learning that the content of the will was "The person chosen by Sakuraba Aoi will be the head of the Hanabishi family", he gave up his position as head of the Hanabishi family to his younger brother and successfully persuaded the Sakuraba family to accept him. In the end, he changed his surname back to Honjou and became a civil servant, living with Aoi in a small apartment.