Crisis Core: Final Fantasy VII/04: An Angel's Dream

This chapters starts in the Church of Sector 5.

Church
After the cutscene, make a separate save IMMEDIATLY, and do NOT walk on the flowers. You will need it if you don't manage to get the perfect date with Aerith. You will also gain access to new missions. Try to do at least the mission M7-2-1 in order to be able to add objects to materia fusion, M7-2-2 to receive the Keychain (you will be able to equip up to 3 accessories) and finally M7-2-5 to receive the Backpack (you will be able to equip up to 4 accessories). There is a chest in the northwest corner of the church. Then, either talk to Aerith or go to the exit.

Sector 5 - in front of the Church
Just follow along and reach the next exit.

Sector 5 - alley
Aerith will stop in front of the Market gate, leave her here and go to the north east talk to a little girl who will give you a new set of missions. In the meantime, you'll receive several mails.

Sector 5 - market
After Aerith leaves you, pay attention to this part, because you must not miss a single step! Make another separate save at the Save Point just in case. Then, go to the west to receive a mail. Finally, try to leave by the south exit. A cutscene will play and you will now have to talk to everyone listed on the map.
 * -Talk to each shop-owner (3)
 * -Talk to the little girl, and choose to wait 10 times until Zack moves by himself
 * -Talk to the little boy and give him 5 potions until Zack gives up
 * -Talk to Aerith again, and then, catch Bruno
 * -Propose to buy the medicine
 * -Make another separate save