Mabel, Liam and Aaron have been friends since childhood. Their bonds of friendship are tested when, years later, they realize their friendship is the only reason they have made it through emotional hardships and extreme tragedies.
| Actor | Role |
|---|---|
 Joseph Chang Hsiao-ChuanLiam | Liam |
 Gwei Lun-MeiMabel | Mabel |
 Rhydian VaughanAaron | Aaron |
 Bryan ChangRon | Ron |
 Serena FangHsiao-bao | Hsiao-bao |
 Ding NingHanako | Hanako |
| HHung-Ying Shang-KuanLiam's Father | Liam's Father |
| LLin Nai-HuaLiam's Mother | Liam's Mother |
| CCheng-Chien ChangAaron's Father-in-Law | Aaron's Father-in-Law |
 Etsen ChenBest Man | Best Man |
| SShirley ChienPresident of the Gym | President of the Gym |
| LLing ChouOppressor Yin | Oppressor Yin |
| SSam HoRon's Husband | Ron's Husband |
 Jill HuSwim Team | Swim Team |
 Kuo Yao-renMilitary Instructor | Military Instructor |
| CChia-yen LeeSwim Team | Swim Team |
 J.C LeiYounger Twin Sister | Younger Twin Sister |
 Nita Hsia Jo-YenOlder Twin Sister | Older Twin Sister |
 Russel TangJohn | John |
| II.-Fan TuMilitary Instructor | Military Instructor |
| WWen-Wen YangJohn's Wife | John's Wife |
 Yeh Hui-chihObstetrician | Obstetrician |