After you and Phi go through the Lounge with Luna, you choose to ally with Luna.

Eventually you have to choose which door to go through. However, you will not be allowed to choose Option C because Tenmyouji doesn't want to be around K.

Option A

• Sigma and Alice go through the green door with Luna
• Tenmyouji and Quark go through the blue door with Clover
• Phi and Dio go through the red door with K

Option B

• Sigma and Alice go through the blue door with K
• Tenmyouji and Quark go through the red door with Luna
• Phi and Dio go through the green door with Clover