Okami no Yomeiri - Ishu Konin Tan (onBLUE comics)

[Machine Translation] A BL of an interracial ken couple married outside of the group. The engagement of two different and "not cool" people. The wolf tribe had a custom called "bride-to-be's body". Kaede, a boy of the rabbit tribe, is to marry into a famous family of the wolf tribe for the sake of the village. Kaede is angry at the marriage, which is like a human sacrifice, but she is determined to meet her fiance, but for some reason Neri, the heir to the family, is cold and brusque. Moreover, as soon as they arrived, Kaede was forced to take a drug called "Daughter-in-Law Body Enhancement Potion" and had her rear hole gouged out with her finger. That was the beginning of the "bride body transformation" that will be given to her for a month until the official wedding ceremony... A cold heir son of the wolf tribe and a strong rabbit tribe raised in a hidden village.

異種ケンカップルの人外結婚BL。異種な上に"いけ好かない"同士の婚約。狼族には"嫁体化"(かたいか)というしきたりがあったーー。兎族の少年・楓は、村のために 狼族の名家に嫁入りすることになった。 人身御供のような結婚に腹を立てながらも持ち前の負けん気で前向きに婚約者と対面した楓だったが、跡取り息子の練は、なぜか冷たくつっけんどん。しかも着いて早々、「異種間で番(つがい)になるためにお前の体質を変える」と楓は"嫁体化薬"という薬を飲まされ、指で後孔を抉られた。それが、正式な婚儀まで1ヶ月間施される"嫁体化"の始まりだったーー。冷たい跡取り息子狼族×隠れ強気な村育ち兎族。