Zero was chewing on his bottom lip as he was holding a bottle of soju in his hands. He's never had a chance to drink for such a long time. The last time he was able to drink was during on a mission as he used to work for the Blue Moon Organization; there were times when he needed to go to such lengths and he hated that ever since. However, when he made that promise to Eunsook, he wasn't disgusted by it... rather he was actually looking forward to it.
Here he was sitting alone in one of the Korean Barbecue Grill Houses. He wanted to honor Eunsook's death and be able to fulfill his promise; he wanted to hold his end of the promise.... even if he was alone.