The Spiral of Sand (Yaoi)

On the evening of his best friend's wedding, Haruka Mido faces the most
traumatic experience of his life. He is savagely assaulted at the hotel where
the wedding party is staying. The attacker binds Haruka's hands and says "I will
make you suffer even more..." ... "I will never forgive you." Haruka has no idea
of the identity of his attacker or why this is happening to him. But during the
assault, he was able to leave evidence in the form of scratch marks on his
attacker's wrists. Several weeks later, when Haruka returns to work, he comes
across a startling discovery - a man with scratch marks on his
wrists!