Kazuichi: He intercepts the letter meant for Sonia, picks up the sewing kit left outside of Mahiru's room, collects my coat, and possibly retires for the night. Waking early he collects the pickaxe from the shed, if he did not collect my coat in the night he picked it up in the morning, and goes to meet Teruteru. The events of that room take place, and he gets to work setting up the pulley system. After this is done he puts everything in place as we've seen it, burning a mystery item in the process. He then goes to our morning meet up, and rediscovers the body while searching for Teruteru meaning that the discovery announcement doesn't immediately go off.

Mahiru: She intercepts the letter meant for Sonia, picks up the sewing kit left outside of her room, collects my coat, and possibly retires for the night. Waking early she collects the pickaxe from the shed, if she did not collect my coat in the night she picked it up in the morning, and goes to meet Teruteru. The events of that room take place, and she gets to work setting up the pulley system. After this is done she puts everything in place as we've seen it, burning a mystery item in the process. She then goes to our morning meet up, and rediscovers the body while searching for Teruteru meaning that the discovery announcement doesn't immediately go off.

Hiyoko: She intercepts the letter meant for Sonia, keeps the sewing kit with her, collects my coat, and possibly retires for the night. Waking early she collects the pickaxe from the shed, if she did not collect my coat in the night she picked it up in the morning, and goes to meet Teruteru. The events of that room take place, and she gets to work setting up the pulley system. After this is done she puts everything in place as we've seen it, burning a mystery item in the process. She then goes to our morning meet up, and rediscovers the body while searching for Teruteru meaning that the discovery announcement doesn't immediately go off.