PINK CRES. Halloween Petit Party! ~Nihei no Otanjoubi Kai! 25 ni narimashita SP☆~ (★ファンクラブ会員限定イベント★「PINK CRES.Halloween Petit Party!～二瓶のお誕生日会！25になりましたSP☆～」開催決定！) is a fanclub event by PINK CRES. to celebrate Halloween 2020 and Nihei Yuuka's 25th birthday. Three shows took place on October 31, 2020 at Pacific Heaven.
In compliance with government policy due to the coronavirus pandemic, cheering, crowding, standing, and closeness in the venue were prohibited, and wearing masks were required to enter.