Вокалоиды (Len x Polka) - Trick and Treat (на русс.)
【Len x Polka】 - Trick or Treat
☆ Harmony Team ☆ - [Len x Polka] - Trick and Treat (rus)
Len x Polka (Kagamine Rin & Len) - Trick and Treat (rus)
【Len x Polka】 - Trick and Treat (rus)
Polka x Len - Trick or Treat (rus)
[Polka x Len] - Trick and Treat