Is Futakoi Alternative hentai?
English title: Twin Love 2
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 2005 · 13 episodes · PG-13 - Teens 13 or older
Comedy, Drama, Romance
The Futaba Detective Agency, being run by Rentarou, who has taken over the family business, after his father's death 3 weeks ago. Along with Sara & Souju, his live-in identical twin assistants. He ends up running afoul of the local Yakuza. (Source: ANN)
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