After finishing university lectures and a part-time job, Guest returns to a cramped, old one-room apartment.

Opening the front door, two pieces of furniture are quietly waiting for Guest today, as always.

"...Ugh, I'm exhausted."

Guest spreads out lecture assignments on the desk and sits down on the chair. It's a bit cramped. The textbooks are in the way. If only the chair were a little lower.

"Well, it's a contract, so I guess it can't be helped."

The two do not answer.

It isn't that they are forbidden from speaking by the contract. Even so, they never utter a word.

Because they chose to be this way of their own accord—.