NMNL Coupon: $10 Off First Box! Posted by Hello Subscription on February 23, 2017. Subscription Box Coupons & Deals / NMNL Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification NMNL, a new Japanese beauty box from Tokyo Treat is offering $10 off your first month now through 2/28! Just use coupon code LOVEISINTHEAIR! Don’t forget that this coupon will expire 2/28 Japan time, so you’ll want to pick this up before then!