Hanamori Yumiri 花守ゆみり – 悲しくて Kanashikute lulu lulu (male pitch full)

Kaguya 3rd Season insert song episode 2, sing by Hayasaka Ai VA (probably).
A parody song from Kana Nishino’s 西野カナ – Aitakute Aitakute 会いたくて会いたくて
Added Karaoke effect to make it sounds like the original anime insert