Bestseller/hype reputation
Multiple reviewers say they bought it because it was flagged as a top-selling or viral plumper on Olive Young, driven by curiosity about its famous 'painful but effective' reputation.
Influencer and social media recommendation
Several reviewers cite seeing the product on YouTube or from specific creators before purchasing, indicating influencer marketing is a meaningful driver.
Repeat purchase/loyalty
A large number of reviews explicitly state this is a repurchase ('リピート購入', 'buy again'), with some saying they've gone through many tubes and consider it a staple item.
Gifting
Several reviewers bought the product specifically as a gift for friends or daughters, suggesting it functions well as a beauty gift item.
Shade/format variety
The 14-option range (colors plus Light/Maxi/clear strength variants) lets buyers choose based on desired intensity and finish, cited as a reason for trial and upgrade purchases.