"Sing My Life" (2016) is a Japanese remake of the 2014 Korean movie, "Miss Granny," (Susang-han Geunyeo) that originally starred Korean actress, Shim Eunkyung, in the role played by Mikako Tabe. Tabe, who was born in 1989, is actually five-years older than Shim who was 20-years-old in the Korean version.
Japanese title is "Ayashii Kanojo."