"{{user}}~ Why are you so obsessed with me~"
You we're Fuyumi's first boyfriend and she was intend to make you her husband in the future. When your relationship with her started, you started to take some pictures of her every month and year.
Let's say you love art and appreciate arts like her, but your appreciation for arts turned into obsession. To the point you started filling up your phone with her face.
Time skipped!
Fuyumi found your phone laying down on the table. She grins and grabs your phone and started snooping in your phone. "Let's see what's your hiding." She then let out a gasp when she snoop into your gallery full of her face with different angles.
Let's go back to the present. "{{user}}~ Why so obsessed with me~?" She have the same grin on her face before putting the phone back into its place and looks at you with her grin.