A wealthy Japanese woman moves into the same block in Nangang, south-east Taipei, as her idol, Taiwanese singer Jam Hsiao, and tries to surprise him with a supper of homemade shark's fin soup one night.
But he never opens his door and has her removed by security guards instead.
This episode was reported by Taiwan Apple Daily in July and the spurned superfan, Yuki Kageyama, has been back in the news after Hsiao had a bucket of excrement hurled into his van last month.
The faeces and urine missed him but hit his driver. Four men were charged in the case.
One suspect, Tseng Yi-cheng, said he had encouraged another man, Chang Che-chih, to take part in the attack after he met Kageyama and learnt of her unhappiness with Hsiao, reported China Times.
But Chang said he joined in the attack for another female fan who had been bullied at one of Hsiao's events.
Kageyama has protested her innocence and last week, the police said they would not question her yet because they had no conclusive evidence.
But for now, she is stuck with her media image as a scary fan.
Kageyama, who is said to be about 40, has been described as the only daughter of a Japanese technology businessman. China Times said she moved from Hong Kong to Taiwan early this year and set up an entertainment company to get VIP treatment at concerts.
Taiwan Apple Daily said she spent almost NT$100 million (S$4.2 million) on Hsiao, 26, in three years.
After she invested sums from NT$100,000 to NT$10 million in his concerts, she would ask to attend his press conferences and post-show parties to be photographed with him.
When he sang at Spring Wave Singapore in May, she spent NT$380,000 on 100 charity tickets to the music festival and also scored a front-row seat.
Things got uncomfortable in March, after a real estate agent convinced the fan to buy a NT$40-million flat downstairs from the singer and took her to see his motorcycle in the basement of the building.