Actually, after dealing with Sakurajima Mai's trouble, Duanmu Huai became interested in the strange phenomena occurring with Sakurajima Mai.
However, he did not pursue an investigation.
The reason is simple, Duanmu Huai is not a theorist.
If Lani, Lumiaire, or Frieren were present, they might have been able to offer a theoretical explanation or hypothesis for what happened to Sakurajima Mai, thus facilitating further investigation.
But Duanmu Huai lacks such skills; he is more adept at knowing where to go, who to kill, and how many.
Sakurajima Mai herself had no clues about her situation, so naturally, Duanmu Huai was at a loss too. Therefore, all he could do was keep Sakurajima Mai by his side and observe the situation, like guarding a rabbit hole.
Unexpectedly, this rabbit actually brought a carrot with her.
Adolescence syndrome.
