Nanatsu no Taizai: Seven Days Anime Details and Episodes A spin-off of Nanatsu no Taizai showing how Ban and Elaine met in more detail. Over the course of seven days with Ban, Elaine's heart is healed. The… Series info Watch free DetailsFormatNovelStatusFinishedScore71/100SourceMangaCountryJapan GenresFantasyRomance RelatedNanatsu no Taizai (Parent Story)Seven Deadly Sins: Seven Days (Adaptation)