Anata ga Koko ni, Inaikara

"Why don't you have a child with me, then?" A woman who lost the husband she adored, and a man who lost the brother he revered, united in the depths of their grief.... The widowed Shion, age 35, spends her days trying to manage the small store she ran with the husband who died three years earlier. But from a sorrow that time doesn't seem to heal, she comes to think, "If only I'd had a child with him, a piece of him would still be here with me." When her college student brother-in-law Kosei learns of Shion's wish, he makes an unexpected proposition that shakes her to the core. Is he doing it out of respect for his older brother, or is it something else...? These two bereaved souls, aching for the same lost loved one, become transfixed by a forbidden notion.... (Source: MangaPlaza)