The Korean 'glass skin' look is a hydration outcome, not a single product. Eight thin layers of differently-weighted humectants beats one $200 cream every time.
The minimum routine. Skip nothing here.
Gel · second cleanse
Hydrating · pH-balancing · first layer
Fermented bean · cult-favorite hydration
Light cream · seals layers
AM only · SPF50+
Optional add-ons. Each has a "when to add" trigger — none are daily-use unless the trigger fits.
Cleansing balm · double-cleanse step 1
When to add: add as 1st cleanse on heavy-makeup or SPF days
Snail mucin · plumping
When to add: add as a hydrating layer after toner for deeper plumping
Final water-based layer
When to add: add as final water-based layer before cream
Overnight mask · 2-3× weekly
When to add: add 2-3× weekly as overnight seal