![](https://image.tmdb.org/t/p/original/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![](https://image.tmdb.org/t/p/w342/6TZ9vHBqxL7RzDkUwNXFpZFmShJ.jpg)
Endorphin
Kwan and Win are both chosen to represent their grade in the Teacher's Day ceremony. Sprite's flirtatious ways get her in trouble.
![](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![](https://image.tmdb.org/t/p/w300/7bVUpjqSUc3g50mUxvtXcvEnLyL.jpg)
Other episodes for this season
![Testosterone](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Dopamine](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Endorphin](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Serotonin](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Estrogen](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Dopamine](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Adrenaline](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Progesterone](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Cortisol](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Testosterone & Estrogen](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Oxytocin](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Growth Hormone](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
![Hormones](https://image.tmdb.org/t/p/w300/kwbr3ETGIIMCuh8hyrAOep35PPr.jpg)
Kwan and Win are both chosen to represent their grade in the Teacher's Day ceremony. Sprite's flirtatious ways get her in trouble.