Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
"Hey My Friend" is Tomoko Kawase's second single under Tommy Heavenly, and the eight overall single from her solo career. Hey My Friend and Roller Coaster Ride were both themes for the movie Shimotsuma Monogatari. The song peaked at #20 in Japan and stayed on the charts for 9 weeks. The Hey My Friend single sold a total of 39,000 units.