 If you liked
Toumei Ningen (OVA)
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 ...then you might like
Soukan Yuugi
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Both involve one male protagonist. Supernatural elements come into play, with objects given by mysterious strangers. One gets a board game that forces players to preform sexual acts, the other gets an invisibility pill. Both have a semi-cheesy humor to them that may elicit some actual laughs. Also, same animation group.