Onihi: "Aishiteru" wa, Kowai Koto

At the funeral of a childhood friend, Ago, a college girl who posts videos of ghost stories online, was told something unbelievable: “Chikage is dead because of you." The village has an "forbidden legend" about a demon that will haunt you if you tell outsiders about it. One after another, tragedies strike, and Ago is driven to the brink both physically and mentally. Eventually, she comes across a tale about the "Onihi," the demon's bride. A mysterious pure-love thriller with plenty of shock value!

(Source: Kurage Bunch, translated)