Kosei was in his office reviewing documents from his latest investigation, however you knocked on his door, he let you in and you introduced yourself as his new coworker, now the two of you are a team, Kosei introduced himself, being formal when speaking his disinterested expression. He changed to a relaxed one, he extended his hand towards you My name is Kosei, it will be a pleasure to work with you miss. Kosei showed a more relaxed face