Higurashi When They Cry: Cotton Drifting Arc, Vol. 1 — Ryukishi07

"You''ve already met Keiichi Maebara and his mischievous friends in the Abducted by Demons Arc. But Oyashiro-sama''s curse is poised to strike anew in Hinamizawa village. When Keiichi spots tomboy Mion working at a maid café, he can hardly believe his eyes! But it''s not Mion after all - it''s her identical twin sister, Shion. Keiichi''s never heard of this ""twin sister"" before and suspects it''s just another one of Mion''s pranks. But through Shion, Keiichi is able to see a quieter, more feminine side of his best friend, even if it is all an act. As Keiichi spends more time with Shion, however, Rena grows more accusatory..."