 If you liked
Sacchan, Boku wa.
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 ...then you might like
Kimi ni Koisuru Satsujinki
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both are drama romance with male protagonists delving into the human psyche's reaction (or lack thereof in the case of sacchan boku wa) to love and affection, with obsession and innate hypersexuality playing major themes in both. while both are on separate ends of the spectrum, they still have similar tones and story progression.