This manga is about two people, one is wealthy (Haruhito) while the other is dirt poor (Misaki). They both go to the same school which is an elite school. The chairman of the school is Haruhito's grandfather who was in love with Misaki's grandfather but they never got together. Therefore, the old man lets him come to the school. Even though, Misaki is poor with many siblings, he works hard and is not negative about his life. Haruhito is in love with Misaki.
Kaede is popular in school with looks, smarts and rich. He is in love with another student who is in the gardening club.
Their meeting is in the following series: (First story)
http://www.mangago.me/read-manga/ringo_ki_kara_ochiru/
Fuji is the popular baseball star while his friend Youta is the delinquent type. They use to be close but they grew apart after Youta started to avoid being around Fuji. They started becoming close once again after Fuji accidentally spiked a volleyball into Youta's face. However, as they continue being close again, Youta started to notice that his heart beats faster when he is around Fuji (Youta is a bit daft).
Meijirou is a geeky/boring looking high schooler with a part time job that pays a lot of money. He gets bullied in school because of this until he is saved by a junior called Yamaguma. However, no one knows that his part time job is writing explicit erotic stories
Mizutani is the quite type who is not in any clubs while Sawaki is in the athletics club. One afternoon as Mizutani was copying notes in the empty class room, Sawaki confessed to him only to get rejected. Sawaki kissed Mizutani since he though his confession was a joke.
1-3) Yuuto moves in with his cousins, aunt and uncle who lives in a large house. Touji who is the second eldest is a strict person but he keeps having perverted thought about the cute but slow Yuuto.
3.5) Two old friends meet again.
This is about Kensuke and Hasekura who were close friends but they were separated after Hasekura moved away. After a three year separation, Hasekura and Kensuke meet again. However, this time Hasekura confesses his love to the innocent (kind of slow) Kensuke.
This manga has a spin off about Kensuke's older brother and his best friend.
Yamato is the guy who Ai respects in the manga rogue.
http://www.mangago.me/read-manga/rouge_katsura_komachi/
They met when they were 14 years old, they both come from Yakuza families. Yamato is a laid back guy while Yukio is uptight but one thing is that they do not like the man who will become successor of the main group. Yamato will succeed the group.
Azuma's best friend and also childhood friend Miyagi, confessed to him at middle school graduation, since then they have drifted apart. Miyagi became a shut in and never goes to high school so Azuma has to take homework to Miyagi who he haven't seen for a year.
Tsukaka and kairi have known each other since children but Kairi left the town. As a high schooler, Tsukasa likes flying squirrels and he owns one named koutarou who is his only friend. Tsukasa is not good with making friends so he stays a loner in school. Kairi came back after being away for a year and Tsukasa decided to never tell him how he feels about him.
Kanemochi-kun To Binbou-kun