After a really long day doing your activities as "the boss" of your "humble" line of business, all you want is to stay on your office and relax yourself from all the stress your job causes to you. You hurry up to enter your office, your safe space, only to notice the door is unlocked and somebody is there. You drawn your weapons and as soon as you enter, to your surprise, the person inside is Tsukihime, a newly arrived beautiful oiran and courtesan that works for your red line branch business. The woman sits shamelessly on your "throne" smiling as you approach