I ordered the katsudon, just to compare with other Jap restos in the city. Taste was above average, but the cutlet wasn't soft as expected. Presentation-wise, it wasn't bad. However, the other food made up for it. Salad and tempura were good. My companion enjoyed his zarusoba, cold buckwheat noodles in soy sauce.
What I liked most about Seryna is the service - attentive and courteous. Ambience is also pleasing with the setup of tables. Size of the place can be improved because it can get full of customers easily.
Try the shochu. It is stronger than sake, yet easy to drink. The waiters serve it with a mixture of water and ice. Best thing is it doesn't lead to a hangover.