Koushirou is my best friend.

Kou Sennen is my best friend.

Photochemistry is a branch of science that studies how chemical reactions proceed under the influence of light.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

He couldn't recognize the character.

The sheep are baaing on top of the mountain.

I received a perfect attendance award.

Akira is always clear-minded and sincere.

A beautiful holly osmanthus is planted in the garden.

Shu is the most excellent student in his class.