In a large mixing bowl, combine ¾ cup glutinous rice flour and sugar. Mix together with boiling water until combined. Allow to rest for 5 mins until slightly cooled down. Knead in remaining glutinous rice flour, ¼ cup lukewarm water, and 1 teaspoon of vegetable oil. Add an additional 1 tablespoon of water, one at a time, to form a smooth dough. Cover and rest for 30 mins.
In a food processor, pulse the black sesame for a few minutes until broken down and fine. Scrape down the sides to ensure all seeds are processed evenly. Add honey and pulse for another min. Then add vegetable oil and pulse until the paste is thickened and smooth. You may need to adjust the amount to ensure the paste is thicken but not too runny or too dry. Divide the paste into 8 portions, rolling each into a small ball.
Divide the dough into 8 even portions and roll each portion into round ball. Flatten the dough ball and add black sesame paste in the middle then seal the edges and roll the dough into a ball.
Brush some vegetable oil to mochi ball then roll them into sesame seeds to allow it to stick.
Preheat air fryer to 200F. Add sesame balls but do not overcrowd and cook in batches if needed. Cook for 12-14 mins and flip halfway. Turn up air fryer to 350F and cook for another 3-5 mins until golden brown. Serve warm and eat immediately.