Kubo Won't Let Me Be Invisible, Vol. 5 by Nene Yukimori

A social butterfly makes friends with a wallflower—whether he’s ready or not!

Junta Shiraishi blends into the background so much that even his classmates fail to spot him. His goal is to make the most of his high school years, but that pesky invisibility gets in the way…until Nagisa Kubo notices him! Kubo’s playful teasing kicks Shiraishi out of his comfort zone and begins a friendship—or maybe something more?

As usual, Shiraishi expects no one at school to realize it’s his birthday. But Kubo changes the trend and gives him a gift! Kubo then snoops on Shiraishi after he receives a mysterious note in his shoe cubby—could it be a love letter?! And with sports day fast approaching, Shiraishi prepares for summer!