I'm not sticking up for it at all in anyway, but more than yaoi, you'll find a lot of sex based manga uses rape as a plot device, unfortunately it's something deeply fundementally rooted in Japanese culture, which is a little sad and disapointing.... and it will probably change soon
If you read the part where both of them met, you can tell Takato had basically already fallen in love with Azumaya. Ik this because When Azumaya was about to kiss him, afterwards Tamar was blushing and was distracted, so to get back non track he asked his manager to cram as much jobs as he could .
seriously why do yaoi manga have so much rape is it really necessary