Basically it's the same proposal, but it ends up distinguishing itself on some points, but, but I'm not taking the merits of '' Ahiru no Sora '', on the contrary, you will have fun and be thrilled watching both animes.
They are very similar, not just because of the genre, but also how realistic it is. Both of the shows focuses more on the drama and hype around it, and I get the same feeling from both shows: I wanna go out and play basketball/volleyball. If you like Ahiru no sora, then you will definitely love Haikyuu!!
Both have plots that involve players who have lost their passion for the sport, but throughout the story reignite their fires. Both main characters also came to love the sport because of their relationships with their mothers when they were younger, although their current relationships with them are very different between the two shows.
dear boys: transfer student Aikawa Kazuhiko move to an new town and show his basketball skills from his old school andand inspire all the 5 members to win the tournament
Ahiru no Sora:Sora Kurumatani transfer from his old town and inspire all the other 4 membersand they all decided to win the tournament
Both anime revolve around sport, with a main character that is very skilful in the sport they play in. However, the sport clubs of each anime (basketball club - ahiru no sora, soft tennis club - hoshiai no sora) are on the verge of an official discontinuance.
Characters in both anime have a deep history, as well as an emotional atmospheres present being present.
Protagonist is dumb, naive and goofy but also a kind, generous and charismatic person.
Both shows are your typical shounen with classic shounen tropes: hard action, slapstick comedy, teenager problems, nakama power etc. Also some enemies may turn into friends in process.
If you are a fan of this genre, you'll like it. If you like one show, you'll definitely like another
Ahiru no Sora made a great call using the same voice actor for Sora as was used for Izuku. Both MC's exhibit the same kind of peppy schoolboy determination, which Yamashita's voice just works so well for, especially with the connotations most veiwers already have going into this after hearing Izuku in BNHA. This was just an excellent casting decision that makes for a good way to connect the audience to an already well-established character from another series.
The main characters are both really strong at the beginning, and they both come in a school were the club is very weak. And their arrival at this club will change everything in it. They also are both extremely passionate and loving the sport that they are doing more than everything. They push the other members of the club to be stronger and stronger, and all the club is improving because of them !
With their teammates their also similiraties : somes are very weak, and the main character helps them, and some are very strong, and they are moving forward together !
Similar passionate, talented, hard-working lead characters who
-are disadvantaged in terms of their height,
-enrol into new schools and transform the existing sports club (sumo in Hinomaruzumou and basketball in Ahiru no Sora) where delinquents are members by challenging the lead delinquent.