User blog comment:V3-CHAN/TT-TT/@comment-53539-20150213211322

Considering many vocaloids get clump together releases, I'm not going to say "its done on purpose". I'm going to say this the "yamaha time slot" they were given.

Its part why Big al has a lot of little ladies on his birthday, and a couple of vocaloids the day before. Yamaha's release set ended up purposely putting them all together... I'm still going to call Cul's birthday and attire a deliberate nod to Big Al either way, Cul's is the only one I'd go so far to say "was done on purpose".