@Ryrie I know, right. He knows Mami dumped the guy after just a month of going out, and he knows Kazuya is head over heels with Chizuru, yet he's going on blabbing about personal stuff with his friend's ex!?
This is one trope of romance manga that i really hate, the "friends" that keep getting in the main characters way and we're supposed to believe there's a true friendship there. Heck, I could extend that trope to other genres of manga as well, such as Shijou Saikyou no Deshi Ken'ichi, which has that "alien" guy we're supposed to root for when Ken'ichi goes save him. The guy trampled over Ken'ichi before he begun training, then after he got strong, the alien kept getting him into fights for no reason other than his amusement or to use him to garner information, and now that he's in trouble, we're supposed to want Ken'ichi to save him!?
Now, I haven't seen grand Blue yet, but I saw some clips on Youtube where the guy is trying to have sex with his girlfriend and his "friends" keep sending messages to his phone pretending to be another girlfriend, knock on his door mimicking girl voices to add fuel to the fire and lastly celebrate when they break up because of this confusion. I don't know what happens before or after this, but despite the laughs it gave me, I would love to see the "friends" getting their just dessert, because those are AAA-Class assholes!