Let's eat together in a coordinated/matching way. (Or more naturally: Let's have a meal together / Let's eat together) Note: "愛色" (aishoku) is an uncommon term, so the most literal translation would be "love color," but in context this appears to be either a typo or specialized usage. If you meant "相食" or "一緒に食べましょう," please clarify.

Kokoa had always spent her time in a gray world. It was love that brought stimulation to such a girl. With Mizuki's first confession, the gray of the world disappeared, and the world became vibrant with color. Kokoa was increasingly drawn to Mizuki, who painted the world with color. Then one day, Kokoa sees something, and anxiety begins to build. Kokoa, who seems like she might fall apart from anxiety, and Mizuki, who tries to accept it. The relationship between these two gradually becomes heavier...