ImuTeru

ImuTeru is the femslash ship between Rifuta Imu and Teruhashi Kokomi from the The Disastrous Life of Saiki K. fandom.

Canon
Imu and Kokomi are both very popular girls at their school. Most of the boys at PK academy had a crush on one of them. Imu believed she was the cutest girl at school. Then she finally saw Kokomi. She kept seeing people talk about how Kokomi was cuter than her. Eventually, she realized how much she was outshined by Kokomi. Imu then tried to compete with Kokomi at the position of the cutest girl in school.

After seeing Kokomi's crush on Kusuo, Imu began to feel sorry for her. That's when she developed some sort of "crush" on the girl. The two girls started to become friends. Later Imu learned of Kokomi's brother Makoto Teruhashi. She thought he was as beautiful as Kokomi, so she developed a crush on him too. She became his fan while maintaining a crush on Kokomi still.

The girls use each other given names for each other. The indicates that they are close. They are seen hanging out with each other sometimes. Imu also likes to talk about Kokomi's brother to her.

Fanon
Many fans started to like this ship after seeing how Imu likes Kokomi. Even after seeing Imu's crush on Makoto Teruhashi, fans still continue to ship this. On a AO3 its the most written for Imu, and second most written for Kokomi.