【古川本舗 × 初音ミク】ナミウ - Namiu【Romaji & English】

Track 6 in Furukawa-P's peams E.P.
Furukawa-P also sang Namiu in SINGALONG3.
You can listen to it here (but no free download is available)
http://www.xiami.com/song/play?ids=/song/playlist/id/1770687390/object_name/default/object_id/0

Illustration: Jun Kumaori