Destiny Star Girlfriend

When campus nobody Seiji is attacked by unhinged space demons, it’s his classroom crush Yuuri who shows up to save the day! Her magical-girl powers easily vanquish the enemy, but a surprise ambush forces her to dive in harm’s way to shield him—leaving both fatally wounded. Luckily, Miss Fujiko arrives on the scene with an enchanted thread to bind both their life forces, sparing them from certain death.