This drama is about an octagon love story between eight characters from A to H that happened in a Manhattan Coffee Shop. The main character is the manager of Manhattan who loves coffee. Without speaking, he observes the love story of his regular customers in his thoughts and becomes entangled in it.
The protagonist in both shows is weird, has a mustache, and is a somewhat indecisive man. He is a regular at/manager of a coffee shop and pokes his nose into the other people's affairs. In both, one of the protagonists is a taxi driver.
Both focus on the personal stories of the customers of one shop, seen through the eyes of the person who manages it. Both are very unique shows.
While Manhattan Love Story is comedy, Shinya Shokudou is slice-of-life.