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summer_redo natsu_no_yari_naoshi 夏のヤリなおし
Natsu no Yari Naoshi, also knows as Summer Redo, is an original doujinshi created by Keiji Asakawa and published under the doujinshi circle Suiren no Yado.
Keito (the main male protagonist) returns to his parent's house in the countryside during summer, where he meets Suiren, the older sister of a neighborhood family and childhood friend. Keito finds out she is engaged, thanks to a jealous Aoi, the youngest sister and also a childhood friend. This starts a series of sexual encounters where he makes both sisters submissive to him, until he must confront their mother, Touka.
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