Red Lust Will Seed
From the East Building Annex Safe Room, exit the room and head through the hallway to the right. This will bring you to a square room filled with chairs. Head through this room to enter the chapel-like room with pews. Cross the room to the other side then head towards the wooden board ramp. Use the ramp to climb up to the top of the crates to reach a walkway above. Head through the door at the end of the walkway then take a right following the hall around. Take the first left and head to the end of the hallway to reach a grapple point. Use the grappling hook to reach the other side of the room where the Red Lust Will Seed can be found.
Green Lust Will Seed
From the Central Tower Safe Room, exit the room and head through the door on the left then pass through the doorway diagonally from you leading to the roof. Climb on the stack of crates to the left to reach the upper ledge. From the ledge, climb up on another stack of crates then climb through the vent shaft to reach a small room. Jump out the window onto the ledge and use your grappling hook twice to reach a higher level of the castle. Climb in through the window to find the room containing the Lust Will Seed.
Blue Lust Will Seed
From the Central Tower Safe Room, exit the room and make your way to the elevator in the center of the map. Take the elevator down then head down the stairs and through the hallway at the end to reach the Kamoshida portrait. Pass through the portrait then take a right. At the end of the hallway, take a right into a room and pull the switch straight ahead. Head back through the portrait and take the wooden elevator on the left side. Exit the elevator then follow the path to run into an enemy in a gold armor suit protecting the door leading to the Lust Will Seed.