That man-child is still living in his parents' house.

He is called a 'kid's room uncle', and is alienated from society.

I reserved a single room.

We booked a double room.

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 continued to hide his talents as if to hide his light and conceal his tracks.