Synopsis

Momo Ayase makes a strange friend at school, a guy she calls “Okarun” because his real name is too strange to say out loud. He’s a UFO enthusiast, while Momo thinks aliens are just nonsense. But Okarun believes in aliens and thinks spirits are a hoax.

To prove each other wrong, they decide to go on adventures: Momo to a place known for UFO sightings, and Okarun to a rumored haunted tunnel. But their journey becomes more than just a debate about aliens and spirits – it turns into a sweet story about young love.
(Source: VIZ Media)
Note: This story has one extra chapter and was nominated for the 15th Manga Taisho Award in 2022.