Part 1:
Break the 3 shining vases and leave the room after the conversation.
Part 2:
Solve the maze on the right to get the key, then enter the room above.
Part 3:
Pick up the 3 forks in the room, go to the basement on lower-right. Solve the puzzle on the left side of the basement, check the bottom shelf of the bookshelf on the upper right. After collect all 5 forks, return to the room, combine them on the table, and complete the dialogue.
Part 4:
Put the sandwich on the dining table, pick up the flower, and place it on the cabinet.
