Boys' Love Novels Paradise Dining Summer Shinozaki Miracle, I've found it.

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

This restaurant is also called Natsushinozaki.
When Shinya, a former elite salaryman, was betrayed by his juniors and was in despair, his cousin invited him to work in Natsushinozaki.
Then one day, Shinya picks up a dirty young man in front of the shop.
If he can't leave him alone and dress himself properly, he is like Renjaku, a beautiful fortune-teller who is as famous as an entertainer. Moreover, he is said to have a real psychic.
Men who aim at his power will chase him and Shinya will run away from Renjaku?