Unfortunately this kind of thing really does happen. Please be wary, especially of someone showing up suddenly and at night.
As hard as it can be to see depicted, I really like how realistically this manga represents relationships and the difference between BDSM and using force.
Even for people who have rape fantasies or kinks, there is a big difference between fantasizing about a scenario, or even carrying it out in a controlled environment, and actually wanting to go through something that traumatic IRL