Obtained: Speak to the Female Staff lady who is wearing a maid outfit in front of Crepe Dia in Harajuku.
You will need to gather Energy Drink x2 and Fresh Spicy Curry x2, all of which can be purchased from Hee Ho Mart. Once you have obtained all the ingredients, hand them over to the lady to complete the quest.
Reward: Melmark, new menu item at Crepe Dia: “Biovitahydroxy Crepe” and entire menu has reduced its prices to 300 yen