Mizushima from the engineering department and Kitagawa from the sales department, who work for a construction company. Although their positions and personalities are different, they are good friends. They still kept in touch, even after they were transferred. Kitagawa came to visit Mizushima one day and told him he got divorced. He even said he's quitting the company! After that, Mizushima was worried about Kitagawa, who had not been able to connect to the phone and had lost contact with him. One year later, he suddenly gets a call saying "I've started a coffee shop"...!? (Source: Takeshobo, translated) *Notes: \- Includes one extra chapter.*