Hummmm... Sadly I can't think of any that are EXACTLY like them but I enjoyed both those shows so I'll list a few that give 당신 the same feelings.
AnoHana: -Natsume Yuujinchou (a few of the episodes feature ghostly spirits, it's a sad and feel good anime) -Hoarubi no Mori e (it's a movie and it involves yokai-spirits) -Clannad (sad... really sad, but it has feel good moments too)
Lovely Complex: -Toradora! (Funny Romantic Comedy) -Say I 사랑 당신 (Romantic, so sweet and has cute moments) -My Little Monster (Really funny romantic anime) -Kimi ni Todoke (Sweet, cute, romance) -Kodocha (Cute couple, lots of drama, hidden feelings) -Marmalade Boy (Sweet, dramatic story)
[pictured: Toradora! is most like Lovely Complex because it is a romantic comedy and the main couple kind of act like Otani and Risa]