Do You Like Big Girls?

Tall Kaoru and short Sota are siblings who are not related by blood. One day, Sota is ordered by Kaoru to become the dormitory manager and coach of the university's women's volleyball team, but he unexpectedly reunites with his first love, Ayano, who is also a member of the team!
As the dormitory manager, Sota begins living under the same roof as the team members. But that night, he witnesses an unexpected side of Ayano, the woman he has always admired...!?

Despite having suggested the date herself, Kaoru is shaken when she learns that Sota and Ayano have gone to a hotel.
Nevertheless, as Sota's older sister, she tries to mediate between them...
Meanwhile, Sakura, Kyoka, and Yuria, having heard the whole story, come up with the bizarre logic that
"since we are also members of the girls' volleyball club like Ayano, we should have the right to do the same thing,"
and begin to seduce Sota!

Sanae, the club president who had been absent for a while due to family reasons, returns to the volleyball club, and all the girls are reunited in the dormitory.
Sanae, a libero who specializes in defensive back-row positions, is petite despite being on the volleyball team, and
Sota is drawn to her because she is shorter than him.
The group decides to throw a Genghis Khan barbecue party to celebrate Sanae's return and welcome Sota back.
But that night, an unexpected romantic development awaits Sota!

Sakura is usually a playful girl.
One day, when Sota tells her, "You'd be cute if you just acted normally," a certain memory comes back to her.
In elementary school, Sakura, who was already tall, acted like a funny character and spent her days with her male friend, Takeshi.
When they entered middle school, they both joined the volleyball club, but Sakura, who was blessed with physique and talent, and Takeshi, who was not, gradually drifted apart...

One night, Kaoru, dressed only in her underwear, shows up at Sota's room seeking help.
Sota is surprised, but it turns out the club members have been holding a mahjong tournament with a stripping rule, and
Kaoru, facing certain defeat, has come to Sota as a last resort to turn the tables.
The prize for winning the tournament is... the right to do whatever you want with Sota!?
Reluctantly, Sota participates to protect himself.
Meanwhile, Kaoru seems to have her own thoughts on the matter...

Sota is feeling awkward because of what happened last night.
Kaoru, on the other hand, tries to act like nothing happened, but Sota's words about Sanae stir something in her heart.
Meanwhile, a secret of Kyoka's is revealed!?
It was something that had been secretly known among the club members, but Kyoka runs away in shock now that it's been exposed.
Mental care is an important job for the dorm head and coach... Sota rushes after her!

The gymnasium is double-booked for both the volleyball and basketball teams.
A competition is held to decide who gets to use it, and Yuria proposes basketball!
There's no way the volleyball team can win against the basketball team in a game of basketball, and naturally, the team members are unhappy.
But Yuria is surprisingly confident, and Sota decides to trust her.
And so, the volleyball vs. basketball match begins!

The girls from the dormitory have come to the shopping district to
buy groceries and other supplies. However, the carefree and unpredictable behavior of the club members
leaves Sota completely at their mercy.
After much fuss, they finally finish their shopping and discover they can try their luck at a raffle.
The grand prize is a pair of tickets for a hot spring resort stay!
Kaoru, concerned about the relationship between Sanae and Sota, wants to win it and give it to them…

Today is Valentine's Day!
Kaoru and Kyoka, both tall and with short hair, are treated like princes by their female fans, receiving chocolates from them.
Seeing this, Sanae and Ayano decide to make some themselves and give them to Sota, and
in the end, all the club members make chocolates together.
Kaoru also hands Sota the chocolates she made.
It seems that there are feelings in these chocolates that are not found in ordinary family chocolates...

"You can't be serious about anything because you're in love with someone you shouldn't be serious about," Ayano said to Kaoru on Valentine's Day night, and those words have been stuck in her head.
Then, unexpectedly, Kaoru runs out of the dorm in the clothes on her back, and Sota follows her and asks her out on a date.
They go shopping for clothes, eat dinner, and drink alcohol.
But then, drunk, Kaoru says she doesn't want to go home...!

Unexpectedly, Kaoru and Sota began a date.
Fueled by alcohol, Kaoru ended up going to a hotel with them, where she reminisced about her childhood.
Tall and nicknamed "The Witch of Toyohira," Kaoru often protected the small Sota who was bullied.
She advised him that if he really fought back, he could do something, but that was only possible because of her physique.
What unexpected suggestion did Kaoru make to Sota, who was half-resigned to his fate...?

Kaoru and Sota return to the dorm in the morning, but both are in terrible shape: Kaoru is hungover and Sota has a facial injury.
Kaoru barely remembers anything, but vaguely recalls that something good happened.
Then, Yuria finally says to Kaoru in front of everyone, "Kaoru, you like Sota, don't you?"...!?
This happy harem story set in Hokkaido comes to an end for now!