S1·E3 Take It Easy with the Food

Yui and IR suspect foul play when Chef Kirch, a family friend who can never get his recipes quite right. In the beginning if he mentions he has a new dish everyone wants to run for cover! Yui unable to turn down a friend tries it. Its actually good! He found a recipe on Comnet and a special seasoning has him with more customers than he can handle. Soon it gets out of hand and he has to face customers who've turned into ravenous zombies.