Total Recommendations: 2
If you liked
Sanctuary
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...then you might like
Mystery to Iu nakare
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Both contain a mystery-layer motif, in which the main character(s)'s secret past is slowly being revealed. Throughout the entire series, the one to advance the plot is the main character(s).
If you liked
Boku dake ga Inai Machi
|
...then you might like
[Oshi no Ko]
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Both are referring to a murder mystery. While the difference being the element of reincarnation in one vs time travel in the other, in both the MC wishes to solve a murder that is related to himself, while uncovering family secrets.