Player Contracts (契約書)

Player contracts are redeemed in presents, where a random player is selected for you that meets the criteria of the contract.

They come in S-Rank, A-Rank, B-Rank, and C-Rank. Sometimes they will have Your Team (自チーム) on it, in which a random person from your team is selected. Sometimes they have a special series like EX or OB in which a random player from that series is selected.

There is also the Gold Contract (ゴールド契約書) which randomly selects a B, A, or S-Rank (where A and S chances are rare).