The characters are brought to life using the E-mote animation system.
When they breathe, wink, or speak, it all looks very realistic.
Additionally, the game features Japanese voice acting.

In this harsh world, what is the truth?
What darkness lies beneath everyone's deceitful smiles?
I have no expectations for interpersonal relationships.

Shunichi Kazama, an ordinary high school sophomore, lives life like a walking corpse due to past misfortunes. He holds no hope for life.
However, on that day, her appearance shone like a ray of light into his gloomy heart.

More details on the official game page of Eternal Light ...