I have found information on the ingredients, positive and negative aspects of some Numbuzin products from two websites, INCIDecoder and SkinSort, as well as a review of one of the products on K Beauty Hobbit. Here are the details:

Numbuzin No.2 Protein 43% Creamy Serum:

• Key ingredients: Nelumbo Nucifera Flower Water, Sodium Hyaluronate, Butylene Glycol
• Positive aspects: Sodium Hyaluronate acts as a sponge helping the skin to hold onto water, being plump and elastic
• Negative aspects: None mentioned

Numbuzin No. 6 Deep Sleep Mask Serum:

• Key ingredients: Glacial Water, Butylene Glycol, Propanediol, Glycerin, Niacinamide
• Positive aspects: Contains Niacinamide which is good for fighting acne, anti-aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots, and better texture
• Negative aspects: Contains fragrance

Numbuzin No. 3 Super Glowing Essence Toner:

• Key ingredients: 50 types of fermented ingredients, Purified Water, Dipropylene Glycol, Glycereth-26, 1,2-Hexanediol, Niacinamide, Butylene Glycol, Glycerin, Methyl Gluceth-20, Spiraea Ulmaria Extract, Lactococcus/Bean Seed Extract Ferment Filtrate, Lactobacillus/Rice Ferment, Chlorella Ferment, Lactobacillus/Algae Extract Ferment, Saccharomyces/Grape Ferment Extract
• Positive aspects: Contains 50 types of fermented ingredients to firm, hydrate, and nourish the skin
• Negative aspects: None mentioned

Numbuzin No.9 Secret Firming Serum:

• Key ingredients: None mentioned
• Positive aspects: None mentioned
• Negative aspects: Contains fragrance

Numbuzin No.3 Skin Softening Serum:

• Key ingredients: Bifida, Galactomyces, Niacinamide, Adenosine, Panthenol
• Positive aspects: Contains Niacinamide which is good for fighting acne, anti-aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots, and better texture
• Negative aspects: None mentioned

Overall, the Numbuzin products seem to contain a mix of positive and negative ingredients. Some products contain fragrance, which can be irritating to some people. However, many of the products contain ingredients that are good for hydrating, firming, and nourishing the skin, such as Sodium Hyaluronate and fermented ingredients.