Nonbiri VRMMO-ki

Tsugumi's twin sisters ask him to act as their guardian in the newest VRMMO game "REAL & MAKE". He recluctantly agrees to join them. While chaperoning his sisters and their friends, Tsugumi also learns and develops his skills in cooking, mixing potions, designing clothes and other seemingly boring yet difficult skills. A fun and easygoing sandbox game set in a realistic world.

(Source: Alpha Manga)