He has a work-phone and his personal phone, dont ask me why his "colleague" messaged him trough his personal when it was work related stuff, little guy be quirky like that i guess, or why mc gave his personal contact info to that guy
Ishizumi really is the "my bed is too fluffy, my lobster too buttery" meme personified. Two hot, successful, lovey-dovey younger women head over heels for him, and he's like, "Oh no, this is terrible!".