Futakoi Alternative is a tV series anime that premiered in spring 2005, produced by ufotable.

About the production: the story comes from an original script, there are 13 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, drama and romance, with themes such as Coming of Age, Male Protagonist, Twins and Detective.

On AniList, Futakoi Alternative has an average score of 65%, a good score, and appears on 6,703 users' lists.

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: Anime News Network)

Official synopsis from AniList.