Order of a turn.
During the Draw Phase (ドローフェイズ, Dorōfeizu), the Turn Player draws 1 card from his/her Deck. This is the very first thing that happens during the Draw Phase, which means an opponent cannot activate a card before the Turn Player draws a card. Some card effects, however, such as that of "Hino-Kagu-Tsuchi", will activate during the Draw Phase, before the Turn Player can draw a card.
If the Turn Player's Deck Zone contains no cards when he/she enters the Draw Phase, and if he/she is required to draw a card, then he/she loses the Duel.
Trap Cards, Quick-Play Spell Cards, and Quick Effects may be activated in this Phase, after the Turn Player has drawn a card.