Wonderful Everyday - Kaikou (Piano Tutorial) 

Wonderful Everyday - Kaikou (Piano Cover) 

Subarashiki Hibi in a nutshell (SPOILERS) 

[RU][OP] Subarashiki Hibi ~Furenzoku Sonzai~ - Fan Russian Translate 

Tsui no Sora Remake Review | Denpa Made Kind of Palatable 

Subarashiki Hibi ~Furenzoku Sonzai OST: Denpa to Denjiha no Kankei slow (unreleased track) 

ナグルファルの船上にて 

[RU][OP Full] Hana - Sakura no Uta - Fun Russian Translate 

So basically it's Yoru no Himawari by szak ryo and H.B STUDIO, but it lasts 10 hours and it's looped 

Wonderful Everyday Down the Rabbit-Hole - Prologue Part 1 (Full English narration)