Cast: Seo Kouji

Ogata Natsuki is the best player on the Kakuchi Junior High Basketball Team. Which is not saying much because they couldn't even get through the 3rd round of the Prefectural Tournament from freshman year until the end of Junior High. For High School, his friends convince him to try out for the Number One High School Basketball team, Fujiwara Academy. So he goes to live with his aunt who runs a hot springs resort to go and try out for the best. Fujiwara Academy.The thing is...he's small. So people look down on him and he has trouble convincing people he's any good. Through one thing or the other, he ends up with Tachibana Mitsuki watching her school, St Mariannu High go up against Fujiwara Academy in a practice game. But the thing is, St Mariannu is very weak. Weaker than even his former school. Fujiwara is just toying with them and now they don't even want to finish the game. What will happen now? Will Natsuki ever be able to achieve his dreams of being High School Basketball's Number 1? And will it be with Fujiwara? 

HALF & HALF(1996)A debut manga work by Seo KoujiHALF & HALF (2007)Nagakawa Shinichi and Sanada Yuuki both get involved in an accident and die together, but they are given a chance to live again. A voice lets them survive for seven more days. However, that after the time limit, one of two must die again.Also, their lives will be shared, including emotions (guilt) and physical sensations (pain). They are told not to leave the other's side, else both of them die. Now, with each of them wanting to save his/her own life, how will the next seven days of non-separation be like? Will they get along?Half & half (2012)Serialized in Bessatsu Shonen Magazine

Kirishima Haruto lives in a small town in Hiroshima and is just about to enter high school when Eba Yuzuki, a mysterious girl from Tokyo suddenly decided to go to high school in the countryside and despite his objections, she moves in to his home. 

1) Love LetterWhile Japan was at war with the world, their romance has just started...2) Half & HalfShinichi Nagakawa and Yuuki Sanada are both involved in an accident and die together. But they're given a chance to live again. God lets them live for seven more days. But the catch is that after the time limit, one of them must die again.There's more. God decrees that their lives will be shared, including emotions (guilt) and physical sensations (pain). They are told not to leave the other's side, else both of them die. What will happen during those seven days?3) AzusaThe last one-shot manga in Seo Kouji's Love Letter tankoubon.

Aikawa Wataru's father is being transferred overseas. Seeing this as a perfect opportunity, Wataru decides to stay behind in Japan and live on his own. Even though he's a new transfer student, his teacher convinces him to become a Library Representative. A fellow Library Rep tells him they’re missing a member and asks Wataru to find her. Not knowing how she looks like, he wanders the school trying to find her only to notice two girls gossiping about her negatively. It turns out the person he's looking for isn't well liked, because of her bad personality.Her name is Kobayakawa Rinko, but what's the source of her bad attitude?

Koizumi Yuta is a 14 year old boy who has quite a bit of a problem. The princess of the magical world, Lucia, has to procreate with him. That child would have the ability to engulf the entire world for 7 whole days. Mikamoto El and Kasukabe Rie are the two angels assigned to make sure that doesn't happen. Kasukabe Rie happens to be the girl he likes. Just how is he going to survive this ordeal?

Yamato is ready for a fresh start. So when his aunt invites him to stay rent-free in her big-city boarding house in hustling, bustling Tokyo, Yamato jumps at the chance. There's just one teensy-weensy catch: It's an all-girl housing complex and spa! Things get even more nerve-racking when Yamato meets his neighbor Suzuka, a beautiful track-and-field star. She's not just the cutest girl Yamato's ever met, she's also the coolest, the smartest, and the most intimidating. Can an ordinary guy like Yamato ever hope to win over a girl like Suzuka? 

Okita Tsurugi is a 3rd grader who's father passed away when he was a young child and he lives with his mother. His father was a famous tennis player and Tsurugi yearns to play tennis too and joins a tennis club and meets a girl, Sanada, who's a tennis prodigy.

The last one-shot manga in Seo Kouji's Love Letter tankoubon. The other one-shots are Love Letter part 1, part 2 and Half & Half.

Yuu Haruna just moved into town and love to be on twitter. Out on his way to buy dinner he bumps into a mysterious girl, Fuuka Akitsuki, who breaks his phone thinking he was trying to take a picture of her panties. How will his new life change now?

HALF & HALF(1996)
A debut manga work by Seo Kouji
HALF & HALF (2007)
Nagakawa Shinichi and Sanada Yuuki both get involved in an accident and die together, but they are given a chance to live again. A voice lets them survive for seven more days. However, that after the time limit, one of two must die again.
Also, their lives will be shared, including emotions (guilt) and physical sensations (pain). They are told not to leave the other's side, else both of them die. Now, with each of them wanting to save his/her own life, how will the next seven days of non-separation be like? Will they get along?
Half & half (2012)
Serialized in Bessatsu Shonen Magazine

Based on DS Dating Sim "Love Plus"

Aikawa Wataru's father is being transferred overseas. Seeing this as a perfect opportunity, Wataru decides to stay behind in Japan and live on his own. Even though he's a new transfer student, his teacher convinces him to become a Library Representative. A fellow Library Rep tells him they’re missing a member and asks Wataru to find her. Not knowing how she looks like, he wanders the school trying to find her only to notice two girls gossiping about her negatively. It turns out the person he's looking for isn't well liked, because of her bad personality.

Her name is Kobayakawa Rinko, but what's the source of her bad attitude?

(Manaka also makes an appearance)

4-koma manga specials included in volumes of Kimi no Iru Machi

Okita Tsurugi is a 3rd grader who's father passed away when he was a young child and he lives with his mother. His father was a famous tennis player and Tsurugi yearns to play tennis too and joins a tennis club and meets a girl, Sanada, who's a tennis prodigy.

Kasukabe Hayato has been accepted to Tokyo U on his first try. Receiving news of his grandmother's death, he returns to his childhood home, Cafe Terrace Familia, for the first time in three years to find five strange girls there who claim to be "Grandma's Family"! Hayato's unexpected life in a seaside town with these five girls of fate begins here! In this handsome harem under one roof by Koji Seo of Suzuka, Kimi no Iru Machi, and Fuuka, which girl will you fall in love with? A seaside love comedy with too many heroines!