After Xiangzi died, I inherited her harem.

Xiangzi died, ten years after our marriage.
Yuu Toyokawa, who became the adopted son-in-law of the Toyokawa family, wakes up to find himself ten years after Ave Mujica disbanded, and Toyokawa Shoko has become his deceased wife!?
Yuu Toyokawa, who became the head of the family, felt that something was wrong with everything. After Shoko's death, Su Shi left the band and became a female executive at a large company. Aine followed the old path and went to the UK to study for a master's degree. Riki bought RING and became the boss's wife, often reminiscing about the past...
Miao Meng, who became a third-tier female celebrity, and Mu, who inherited her family business and became a national actress, are often seen in variety shows broadcast on TV.
And that golden retriever that clung to him at Xiangzi's funeral, refusing to let go even in death.
The way he crawled on his knees, muttering "Xiangzi's taste," made him feel extremely uncomfortable. Was there something wrong with this timeline?
Then we'll just have to explore it ourselves!
……
When the post-coital period ended, she found herself briefly transported to Toyokawa Yuu ten years in the past, looking at the still-alive Ooshiki-sensei...
He realized that this must be Heaven sending him to reverse Ms. Xiangzi's short-lived fate!