Kono Aozora ni Yakusoku wo: Youkoso Tsugumi Ryou e

It has a same arc episode like amagami ss  

Dealing with girls, problems, and everyday life is not so easy. Both Amagami SS and Kono Aozora ni Yakusoku o features separate arcs featuring a different character whom the main protagonist tries to help. Drama and romance are imminent as the story arcs for both series drags on. 

both series consists of one guy and six girls with one of them being a teacher 

umi hayama and konoe nanami both loves to tend to their vegetables, and are childhood friends with the male leads plus both male leads kenji tomosaka and wataru hoshino have one senpai each: tae isawa and naoko asakura, and are both student council presidents, although tae isawa is the good-tempered version while naoko is the strict version 

Similarities: Both are set in a Dormitory. Both have the same Harem and romance genre. Both muchachos are gentlemen. Both muchachos have someone in their harem whom they don't wanna mess with. Both have one member of the harem who's older than the muchacho. Dissimilarities: One has an extra ecchi, slice of life, shonuen and comedy gernre, while the other has a school genre. In LH nearly every members of the harem has feelings for the muchacho, while in KAY the muchacho maintains a kind of brother and sisters relationship with his harem. LH has a couple of OVA's and special episode added, while in KAY it is only limited to 13 episodes. In LH the muchacho has a happy ending with one of the members of the harem, while in KAY the muchacho never ended up with any of the members of the harem but, he is still in touch with one of them. LH is purely comedy, while KAY is more on the dramatic side.  read more