[Tomislav]

Spoiler for Spoiler for Ep. 5:

At the summer festival, when Konata tries to get a red fish, she could be quoting from Pokemon: "Gotta catch 'em all".

My very favourite one: when doing "some solo hunting, just 30 minutes", Kona-chan gains the Levantine sword: this must be a reference to Mahou Shouju Lyrical Nanoha A's and StrikerS series where one of the characters, Signum, uses as her weapon the "fierry, demonic sword, Levantine"

Spoiler for Spoiler for Ep. 7:

Pachebel Canon is, to me, a clear citation of Neon Genesis Evangelion... in Air(II) it is played, if I remember correctly, by the children - and was supposedly used as "inspiration" for the Komm, susser todt song.

The Curry can also be a reference to a Naruto's filler... in that case, I'm happy I wasn't the only one watching.

Spoiler for Spoiler for Ep. 9:

The TV show Tsukasa intended to watch but decided to register has been said to be 14 sai no haha but, IMHO, the given description suits also Ay Yazawa's "Nana".