Hachibei Maeda is a guy with very, very particular tastes in women. In fact, he isn't so much into girls as he is into his ideal attributes: big, crystal blue eyes; perky breasts "like bullet trains"; a husky, womanly voice; long, lean, streamlined legs; etc.The good news is, he's been accepted at a prestigious high school in Tokyo, and he's sure he'll find at least one of his "beloved parts" in the big city.The bad news is, when he gets there, he finds the boys' dormitory has been burned down, and he can't afford an apartment.The good news is, he's offered a place to stay... in the girls' dorm... with four beautiful women, each of whom has one of the attributes he's looking for in a girl (Fiery Redhead Sakurako and her eyes, shy and bespectacled Yukari and her breasts, twenty-something teacher Tsubame and her legs, and sarcastic ninja-girl Kirino and her voice).The bad news, he almost immediately gets off on the wrong foot with them, and now they all think he's crazy, a pervert, or both. Okay, so he is, but that's beside the point...Thus begins Ai Kora: Love & Collage, an endearingly warped and ecchi take on harem comedies and every fetish you can possibly imagine, from the creator of Midori no Hibi. As Maeda quests (with limited success) to win over the girls, he finds himself learning more about them (and himself) as he learns to appreciate them for more than their parts.
D-Cup Distress: Yukari's first chapter revolves around her growing tired of people pointing at her breasts and trying to wear a bra that's several sizes too small in hopes they'll eventually shrink. It causes her significant pain, and Hachibei eventually convinces her to stop.
Dull Eyes of Unhappiness: Sakurako gets these in a manga chapter where she tries to give up her thrifty ways. Since Maeda's so fixated on her eyes, he's one of the first to notice them.
Expy: Two characters are clearly inspired by Neon Genesis Evangelion: Sensei Tsubame has purple hair, drinks heavily, and is a car nut/crazy driver — Misato. Sakurako has orange hair with red ribbons, blue eyes, and a fiery temper — Asuka Langley Sohryu.
This manga is very similar to Love Hina in terms of characters: Sakurako = Naru, Yukari = Shinobu, Kirino = Motoko, and Tsubame = Mitsune; however Hachibei is less like Keitaro, and more like Ataru Moroboshi.
Many of the characters look like the characters from the artist's previous series Midori Days.
Gag Boobs: A very rare case of them being realistically sized. While Yukari's breasts are certainly large, they're far from abnormally so for a girl her age. The reason Maeda obsesses over them is because of their shape, not their size.
Genius Bonus: Yukari being an archery champion (archery being a sport that famously requires its female participants to possess flat chests, while Yukari has Gag Boobs) is a joke that would go right over most people's heads.
Get A Hold Of Yourself Man: Yukari delivers one to Maeda, and tells him to fight for Sakurako, after he slips into despair when it looks like he's lost her to her old boyfriend.
Girls with Guns: A chapter taking place at the school Christmas party features a paintball match; Ayame pulls out a paintball machine gun at one point.
Moment Killer: Probably not the best of ideas to confess just before the police storm the building to "rescue" you.
Nice Hat: Not as a cool factor or anything, but Sakurako is often seen wearing her beret. It even serves the plot a bit during their Crash into Hello moment because it prevented Maede from seeing her beautiful eyes.
Reality Ensues: It's not a good idea to come right out and say that you like a girl solely for her body parts to her face,especially after she confessed to you. Shrinking Violet Yukari is rightfully insulted, and monumentally furious at Maeda. Other events play out against expected tropes as well.
Reset Button: A number of chapters end with Maeda making progress in his relationships with the girls, only to undo it all, or at best most of it, by saying or doing something stupid and/or perverted.
Temporary Bulk Change: Happens to Ayame chapter 59 when stress from a scandal at her father's company causes her to over-eat, and to Hachibei when he tries to intercept her food in an effort to prevent her getting any fatter. It later happens to Yukari, Sakurako, and Kirino in chapter 88 thanks to a meddling Chubby Chaser doctoring the dorm's water supply.
Tsundere: Sakurako and Kirino. Spoofed/lampshaded with Asagiri from the maid cafe in chapter 15.
Unstoppable Rage: Maeda gains superhuman abilities if 'his' parts are threatened (or if he's promised a feel). He once defeated a gang of Japanese Delinquents because they damaged the breasts on a statue.
Could even be inverted. As noted above, while it's Maeda who wants the girls, it's the girls who don't want him. Until recently. And only in some cases. And then there's Ayame, who's just nuts, but lately seems to have developed feelings for Haiji.
What Is This Thing You Call Love?: Maeda apparently has never been in love before he starts developing feelings for Sakurako; he even says these exact lines. He does seem to have huge sexual lust for the girls though, which, according to him, is completely different from romantic love.