Quick answer — Nako Misaki performed 1 anime theme, including "Sweet Sign" from The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You.
Nako Misaki performed the anime theme songs "Sweet Sign" (The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You).
Nako Misaki's first listed anime theme is "Sweet Sign", the ending of The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You.