In what way does your game fit the theme?
Stronger together, Because you're the strongest with your friends who are always there for you!
As Emeralda is sent to a deep sleep state for unknown reasons, Her friend Bakurer spoke to her soul as her body was in sleep stasis. He finds out that the OjiHumans were already catching up to her!
He's willing to fight any danger for his friend no matter what even if he has to fight the evil residing in her soul and even the unforsaken Ojihumans! bringing up the old saying "A friend in need is a friend indeed".

-As for the true ending, after the epilogue should be the protagonist waking up his friend, helping her to stand again, and releasing the Objhuman evil from the possessed for the latter becoming his friend too!

Did you write all the code yourself and made all the assets from scratch?
No, I've used some assets & tools from:

Graveyard Scene environment: https://assetstore.unity.com/packages/3d/environments/urban/colonial-city-littlepack-163089

clean UI: https://assetstore.unity.com/packages/tools/gui/clean-settings-ui-65588

skybox: https://gitlab.com/janmroz97/stars-skybox-shader/

Character animation: https://www.mixamo.com/#/

character models & face animation blend shapes from Vroid studio

character import to unity via UniVRM: https://github.com/vrm-c/UniVRM

Particles: https://assetstore.unity.com/packages/vfx/particles/cartoon-fx-free-109565