90 seconds to learn about eyestrain and short-sighted

Eye-straining works, such as PC work, cause eye diseases. Learn how to treat your eyes in 90 seconds.
Japanese Learning Course for JLPT N2 Level
Learn Japanese tea ceremony etiquette for guests in 90 seconds Learn Japanese tea ceremony etiquette for guests in 90 seconds
Learn how to draw illustrations in CLIP STUDIO PAINT in 90 seconds Learn how to draw illustrations in CLIP STUDIO PAINT in 90 seconds
Learn about the chirping of a cricket (Korogi) in 90 seconds Learn about the chirping of a cricket (Korogi) in 90 seconds
90 seconds to learn Japanese vocabulary - Theme: Train! 90 seconds to learn Japanese vocabulary - Theme: Train!