Cells at Work by Akane Shimizu Volumes 1, 2, 3, 4, and 5 Purchased used four years ago. I think they are generally in good condition. Cells at Work! Code Black by Haruyuki Yoshida Volume 1 only. I fondly remember being slightly shocked that it wasn't drawn by Shimizu-sensei when I bought it back then, but I think it's quite good now. If you're interested, please take a look.