
Sensei and granpa has more chemistry in them rather than student-kun. They just have more depth with each other. Kouhai-kun's side is too simple for me, it's like a shoujo type where A suddenly goes dokidoki for B, then asking B to go out with him..idk im not feeling them. Considering the vibe of this manga has realistic tone and text, i was sure and hoping that the grandpa will pick the sensei..buut i guess not. Kinda disappointed.

It's because the tone is rather realistic that the old guy ended up having a relationship with the gay guy and not his straight son-in-law. Having a good chemistry is nice and all but that doesn't make a straight man gay. I would've been extremely disappointed if this had turned out to be another "I'm not gay but if it's you" type of story.
It's also quite realistic that a teenager falls in love with someone quickly.

Thanks. Your comment actually helped me to put a finger on why I like this one.
Among other things it IS good it´s not "I am not gay but..."
Anything you could recommend with a realistic touch to it? It is so.. annoying to be looking for something like that and going through piles of similar yaoi stuff. :(

I don't have that many realistic BL manga/comics I can recommend to you because I usually read dark/dramatic stories or comedies and those aren't very realistic but maybe you'll like one of these (all of them except for one are finished):
http://www.mangago.zone/read-manga/all_about_lust/?av=1
More of a comedy and a little bit smutty but the characters act mature and the relationships are healthy.
http://www.mangago.zone/read-manga/on_doorstep/
Another one with a big age-gap (although not as visible) but rather short.
http://www.mangago.zone/read-manga/shimanami_tasogare/
It's tagged as shounen ai but I don't think it was sold as BL. Anyway, it's pretty good :) .
Then there's the still unfinished
http://www.mangago.zone/read-manga/itoshi_no_nekokke/
I really like it (one of my favorites) but there's a character labeled as straight who ended up in a relationship with a man. However, that character didn't have much of a sex-drive to begin with and their journey is very well written that's why it never feels extremely unrealistic.
I can also recommend
http://www.mangago.zone/read-manga/momentum_park_ji_yeon/?av=1
and
http://www.mangago.zone/read-manga/dark_heaven/
to you but I guess you already know them (if not go read Dark Heaven, it truly deserves all the praise it gets).
That's all I can think of right now :) .

Thanks so much... I will def have a look at those.. I liked 'On the doorstep' and 'Momentum' is...kind of a masterpiece...IMHO...
On the doorstep... I like when the characters look mature.. The adult world.. It's hard to find..
I opened Dark heaven a few times and put it aside, I will try again... I put aside Momentum a few times, then I read a few pages more one evening..... and..finished in the morning, totally wrecked and..it's really good...

Thanks so much... I will def have a look at those.. I liked 'On the doorstep' and 'Momentum' is...kind of a masterpiece...IMHO...
On the doorstep... I like when the characters look mature.. The adult world.. It's hard to find..
I opened Dark heaven a few times and put it aside, I will try again... I put aside Momentum a few times, then I read a few pages more one evening..... and..finished in the morning, totally wrecked and..it's really good...
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Why is Hyesung doing this? I mean Dojin already said he loves him, he kept the baby, i'm sure he'll treasure him and be a good husband. Hyesung already has a place to go to. I know their start is rough (with that pregnant and stuff), but Dojin changed, well at least for me he changed, they can talk things out. So why Hyesung still ignores this stuff? im not hating him, im just frustrated.
Is Byul an alpha? did i miss it or i just completely forgot.
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Sorry I meant to thumbs up!!