Had I Not Seen the Sun 如果我不曾見過太陽 is a 20-episode Taiwanese mystery romance series that premiered with Part 1 一部曲 of 10 episodes on November 13, 2025. Part 2 二部曲 of another 10 episodes is scheduled to premiere on December 11, 2025.
When a notorious serial killer gets interviewed by a young woman for a film, his past reveals a deep web of trauma and heartbreak tied to his first love.
Had I Seen the Sun 曾經見過太陽 (theme song) – Shi Shi 孫盛希
Overwriting 覆蓋回憶 – C.Y 蔡承祐
Update December 5, 2025: A few more songs from the OST…
That Day 那天 (1999) – Faith Yang 楊乃文
I Love Taiwanese Babes 我愛台妹 (2006) – MC HotDog 熱狗 & A-Yue 張震嶽
Dance With You – KAXA
Be Your Sun – U:NUS
Update January 3, 2025: Here are three more songs from the OST and also the MV for Overwriting…
Nameless 無名氏 – KAXA
Chasing the Light 飛蛾與蝴蝶 (closing theme song) – C.Y 蔡承祐 × ZORN
Shadow 影 – Lexa (of KAXA)
Overwriting 覆蓋回憶 – C.Y 蔡承祐
Corner Café 
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