If you're looking for manga similar to Ano Hi no Kokoro wo Toraete, you might like these titles.
The story centers on a man named Toki (39) and a woman named Remi (39), childhood friends who are now in their forties. Remi is a widower, and now lives with her mother and daughter. Toki returns to his parents' home after a divorce. After their reunion, Toki opens up to Remi about his divorce.
Kazushi has longed for his childhood friend Izumi for years. And just when it looked like Kazushi had finally convinced him that they would make an excellent couple, Izumi up and disappears?!
Takuya, Yuiji, and Aki are childhood friends who have always been together. Takuya secretly likes Aki, but she suddenly gets a boyfriend. Takuya nurses his broken heart with Yuiji, who suddenly confesses that he's always liked Takuya.
Due to work, Tatsu moves back into his parents' house; soon after that, he encounters a young woman who turns out to be Ri-chan, the little girl he used to play together with in his childhood. However, this girl he reunited with has somehow become very different from the cheerful childhood friend in his memories...
"I've been in love with you for so long that I can't even remember when it started... "Tatsunoshin, an aspiring cook, and Nanami, a diver, are close childhood friends who, before they knew what happened, were even masturbating together. For the sake of changing how he's always doted on by Nanami, Tatsunoshin decides to leave the island. However, Nanami replies, "Leaving won't change a thing, You'll always be dearest to me," and refuses to give up.
Nina, Aki and Sakuya are inseparable childhood playmates, but one day, Sakuya just ups and vanishes. Even after six years have passed, Nina still can't accept Sakuya's mysterious disappearance. Aki tries to support Nina, and so, they agree to return to the day when Sakuya went missing...