Okay, so also an unfamiliar one. This is Hanamizuki from Kazuhiko-san's new album: Iyashion. I think it's quite relaxing.
Disclaimer: I own nothing, just here for sharing.
Lyrics:
Sora wo oshi agete
Te wo nobasu kimi go-gatsu no koto
Douka kite hoshii
Mizugiwa made kite hoshii
Tsubomi wo ageyou
Niwa no hanamizuki
Usubeni-iro no kawaii kimi no ne
Hate nai yume ga chanto
Owari masu you ni
Kimi to suki na hito ga
Hyakunen tsuduki masu you ni
Natsu wa atsu sugite
Boku kara kimochi wa omosu gite
Isshoni wataru ni wa
Kitto fune ga shizun jau
Douzo yuki nasai
Osaki ni yuki nasai
Boku no gaman ga itsuka mi wo musubi
Hate nai nami ga chanto
Domari masu you ni
Kimi to suki na hito ga
Hyakunen tsuduki masu you ni
Hirari chouchou wo
Oikakete shiroi ho wo agete
Haha no hi ni nareba
Mizuki no ha, okutte kudasai
Mata nakute mo ii yo
Shira nakute mo ii yo
Usubeni-iro no kawaii kimi no ne
Hate nai yume ga chanto
Owari masu you ni
Kimi to suki na hito ga
Hyakunen tsuduki masu you ni
Boku no gaman ga itsuka mi wo musubi
Hate nai nami ga chanto
Domari masu you ni
Kimi to suki na hito ga
Hyakunen tsuduki masu you ni
Kimi to suki na hito ga
Hyakunen tsuduki masu you ni.