Takou no Koori Hime o Tasuketara, Otomodachi kara Hajimeru Koto ni Narimashita - Vol. 1 Ch. 4.1 - The timing

[Chronigan]

ultra cuck behavior

turns down the girl he likes so that he can teach his friend and his friend's girlfriend

Do you not know what the word cuck means?

 

[NishaAzalea]

is this series really going to take place entirely on the train?

They will date on this train, kiss on this train, marry in this train, make love in this train, and have many babies in this train!

They will even be buried under the compartments of this train!