Midareta Futari no Mitasare Gohan

Runa Hikami is an office lady who decided she wouldn't eat too much no matter how hungry she is. Ichika Koizumi is a high school girl who eats whenever she feels like it regardless of the time or place. Runa's restraint means she won't make any compromises when it comes to eating delicious things. Ichika isn't fussy when it comes to eating and doesn't know anything about ways to make things tastier. When these two eat together, it becomes an "obscene meal"!

(Source: Kadokawa, translated)

Included one-shot:
Volume 1: Midareta Futari no Yarare Meshi (pilot)