Viral social buzz
Many reviewers mention buying it because it's known as the '飲み会リップ' (drinking-party lip) that went viral for not coming off, driven by influencer and word-of-mouth reputation.
Cute packaging
A very large number of reviews cite the bottle/case design as a primary reason for purchase, describing it as 'aesthetically pleasing,' 'luxurious,' or gift-worthy even before trying the formula.
Long-lasting stain reputation
Reviewers repeatedly say they bought it specifically because of its reputation for extreme staying power through meals and drinks.
Repurchase/collecting shades
Multiple long-time users mention owning most or all colors in the line and repurchasing repeatedly, showing strong brand loyalty.
Sales and discounts
Several Korean and Japanese reviewers mention buying during Olive Young sales or discount events, indicating price sensitivity drives conversion.