Who does Endou Mamoru like in Inazuma Eleven

In the anime he doesn't have a love interest, while in the second game, based on the version he'll have a romantic relationship with either Aki or Natsumi. It is confirmed that in the Fourth series Inazuma Eleven Go Endou is now 24 yrs old, the coach of new Raimon Eleven and he is married to Natsumi. While, Aki is hinted to be in a relationship with Ichinose.