Japanese milk bread

Name: Japanese milk bread
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Japanese
Ingredients: 2 tbsp bread flour ((2tbsp is approx 20g)); 90 ml water; 300 g bread flour ((300g is approx 2 cups plus 2 tbsp)); 7 g fast acting yeast ((technically a little under but can use 1 sachet, 1/4oz/ 7g)); 120 ml milk ((lukewarm or room temp, but not hot)); 28 g unsalted butter (melted but not hot); 5 ml salt; 42 g sugar ((caster sugar/fine)); 1 egg; 1 egg ((lightly beaten - won't need all))