- Do As Infinity
- Catalog Number
- Tsurezure Naru Mama ni (徒然なるままに; With Tedium And Boredom At My Side)
- Week! (Instrumental)
- [[Tsurezure Naru Mama ni|Tsurezure Naru Mama ni (Instrumental) (徒然なるままに; With Tedium And Boredom At My Side)
"Week!" is the ninth single released by Do As Infinity. The main track was used as the theme song to the dorama "Yome wa Mitsuboshi". The single reached the #8 position and charted for 6 weeks. It sold 72,900 copies.