Pettanko + Fangs + Tsundere + Vanilla.
But the most important is THE BIG FAT KINDLY GUY FINALLY GOT WHAT HE DESERVE, VANILLA STORY!

APPROVED!!!!

The girl looks suspisiously like a monster girl... Either way we can all agree that after all the punches he got he deserves to return in a second part...

He may lack society's desired appearance, but he makes up for it with conviction.

Favorite!

Am I the only one that thought the heroine looked kind of like a loli vampire?

This brought a tear to my eye.

Wow, what a tough, resolute kid. Admirable.

That was a kinda adorable ending

This male protagonist reminds me way too much of myself. Except that my engagement fell apart, and my ex-fiancée, while short, was quite busty.

omg that guy is a G, great ending feels me with joey

Nice art work. It looks like painting not drawing.

I'm guessing somewhere out there (in no specific order) Kenshiro, Rei, Toki, Raoh, Jojo Joestar, Space Adventurer Cobra, Golgo 13, Spike Spiegel, NaGARsumi, and a legion of other anime/manga tough guys are saluting with manly tears at "Piggy" becoming a MAN.

APPROVED!

Is hate the opposite of love? I'd say it's more indifference but okay. Besides, 'hate' or at least what seems like it can just be a tsundere who can't be honest with herself, and all she needs is a bit of...Vanilla filled coaxing(loving).
Ah, the good old 'practice beforehand' excuse to have sex.
Much respect to the guy though, asking her to defy her family's lame tradition and promising to protect her. Good on you, man! He even went to have a...'talk' with her father.
Enduring the bullying is fine, but considering he now has a cute wife to protect too, next step would be to get strong enough to get rid of any possible future bullying and protect your wife, forevermore, yes?

Kinda messed up ending if you think about. Oh well, it was a happy ending in some shape or form

Tsundere, Vanilla, Pettanko. Ah the classics!
Bullying your loved person... Shinju-chan is like a 11 years old boy!