Clannad, Grisaia no Kajitsu Recommendations
Harem. Fun and entertaining story in which the main character: a lazy good-looking sarcastic teenager with some secrets, opens up the possibility of redemption to the hot girls that surround him by helping them out.
Both revolve mostly around a male MC who helps out each girl with her problems.
Both series are originally based off visual novels and thus have many harem aspects to them.
Both series managed to make me cry a lot so they're both successful tearjerkers.
The word 'harem' generally has a static meaning, but Grisaia no Kajitsu and Clannad redefine it. Both are stunning school romance dramas, featuring similar protagonists. They follow the same formula, dedicating a few episodes to each of the girls. Both series are effective tearjerkers and are absolutely heartbreaking.