If you're looking for manga similar to Dareka no Manazashi, you might like these titles.
Two people spend the last day of their cohabitation together before she gets married.
A shared cigarette offers a momentary connection. A closet hides the evidence of an embarrassed bachelor's laziness. A single woman, not getting any younger, sifts through letters from would-be husbands. A new couple buys two train tickets to anywhere.
A story about a mysterious penguin and a clumsy young shopkeeper traveling a dream.