So, the guy here is your childhood friend..
You met with him while he's on special errand while you're all alone waiting for your friend..
He bid goodbye and just mentioned to be careful. And you chose to follow him to the train. He asked you about the call from your friend who mentioned about a new type of medicine called "F", he warned you to be careful about unfamiliar things like that.
He said not to worry much about him while he stopped in the next train stop.
Then, you follow him to the place he mentioned to be his workplace. While peeking on him, you accidentally made some noise and Poof! Many guns targeted in you two..
He was able to save you, thankfully..
And you woke up in a secret place, chained in front of your own childhood friend
He said that you had done something worse that can endangered your own life
That's why he confined you in this secluded place...
"I never hate you, but you may hate me for this"
And then goes with the H thing...
He even still able to tease you while seeing you in such condition...
He kissed you all the way and fingered you..
Oh Majima... you perverted tsundere guy LOL
It turns out that that moment was your first time Duh...
That's quite cute if you hear his reactions here...
Later, you who still in that mysterious place, heard some conversation between your guy and someone..
When he finished, he went in your place and said that you should eat something since you look soo badd..
Your friend emailed you and he informed you about this..
When he looked at your hand wrist which got reddened by the chain, he kissed it softly and he teased you again for crying after he kissed you there..
Aaaaanddd he fingered you again :3 then he asked you to "eat" him..
Please don't ask me what it is...
this is an R-18 after all, you should have known it by yourself...
He even taught you how to "eat" by practicing it on your finger~
Good boy~! (Y)
He even put a vibrator in you while ordering you around to eat him LOL
Seriously, are you having unrequited love here or what???
And finally, he really put his thing inside you after some short foreplay here and there~
"Why, out of all people, it should be you who watched it?"
I guess, since you two are childhood friends, he easily let you out of that place with condition: as long you're under his supervision.
Which means, to be with him in a date~