Quick Answer
It is romantic and emotionally charged, but this story is low spice rather than high-spice romantasy.
Home / Guides / Is Once Upon a Broken Heart Spicy?
This book is not spicy in the way adult romantasy is spicy. It is far more associated with yearning, fairytale atmosphere, magical longing, and romantic tension than with explicit on-page heat.
If you are comparing it with ACOTAR or Fourth Wing, the key expectation is that this story stays in the low-spice YA fantasy romance lane. The romance is strong, but the explicitness is minimal.

It is romantic and emotionally charged, but this story is low spice rather than high-spice romantasy.
It is much more about chemistry and longing than explicitness. The series thrives on magical bargains, emotional tension, and fairytale fantasy mood instead of adult heat.
For most readers, it sits in the low-spice range. The book is romantic and emotionally intense, but it is still much milder than mainstream adult romantasy.
It feels like fairytale fantasy with a strong romantic thread rather than romance-first adult romantasy. The whimsical fantasy tone matters as much as the relationship tension.
It is generally treated as YA fantasy romance, which helps explain why readers usually describe the spice level as low.
Compared with adult romantasy, many readers would consider it relatively clean or at least much less explicit.
For most readers, it is low spice rather than truly spicy. If you want magic, chemistry, and yearning without heavy explicit content, it is likely a strong fit. If you want ACOTAR-level heat, it will probably feel mild.
Not for most readers. It is usually described as low spice with strong romantic tension.
It generally falls in the low-spice range, with more longing and chemistry than explicit content.
Compared with adult romantasy, it is relatively clean or at least much less explicit.
It is generally treated as YA fantasy romance rather than adult romantasy.
It usually feels like fairytale fantasy with a strong romantic thread rather than romance-first adult romantasy.
No. Most readers would expect it to feel much milder than ACOTAR.