#little_ellys [Instant Purchase OK] Serotonin Chemical Formula Necklace [Silver] Science Series This simple necklace features a serotonin charm, also known as the "happiness hormone," and is perfect for science-minded girls and boys ﹙˙꒳​˙﹚⋆˳⑅ It's easy to wear and suits any outfit ✨ [Gold ver. is also on sale!] ■color Silver ■size Serotonin charm: Approximately 25mm Necklace: Approximately 40cm ※ The length of the necklace can be changed (free of charge). Men are recommended to choose 45cm + adjuster ✨ [40cm (without adjuster)] [40cm + 6cm adjuster] [45cm (without adjuster)] [45cm + 6cm adjuster] ⚠️ Please choose the chain length from the above ⚠️ ✄----------------------------‐✄ Combined purchase discount available ☜ ※ Handmade items on sale Discount for simultaneous purchase! 2nd item → 50 yen off 3rd item → 100 yen off 4th item → 150 yen off... ✄----------------------------‐✄ Chemical formula / Molecular structure / Science-minded / Rikejo (science-loving girl) / Study / Serotonin / Men's / Accessories / Molecular formula / Chemistry / Science / Happiness hormone / Silver / Science /