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拝啓、天国の姉さん、勇者になった姪がエロすぎてーー 叔父さん、保護者とかそろそろ無理です＋（ぷらす）
拝啓、天国の姉さん、勇者になった姪がエロすぎてーー 叔父さん、保護者とかそろそろ無理です＋（ぷらす）, Haikei, Tengoku no Neesan… Yuusha ni Natta Mei ga Tsuyosugite Oji-san… Hogosha toka Sorosoro Muri desu., Haikei, Tengoku No Nesan... Yusha Ni Natta Mei Ga Tsuyosugite Ojisan... Hogo Sha Toka Sorosoro Muridesu., 拝啓、天国の姉さん…勇者になった姪が強すぎて──叔父さん…保護者とかそろそろ無理です。, Haikei, Tengoku No Neesan, Yuusha Ni Natta Mei Ga Ero Sugite Ojisan, Hogosha Toka Sorosoro Muri Desu
A former strongest mercenary, he was injured and retired, then his fiancée ran away and he now spends his days drinking away his time as a middle-aged adventurer (a virgin). Then his niece Liz, whom he once taught swordsmanship, shows up to visit him! Angel is confused by how she has grown into a stunningly beautiful girl, but Liz has declared that she will marry him regardless of his feelings...!? A thrilling adventure fantasy in many ways, woven by a beautiful heroine and a middle-aged uncle!
