Big Boobs Sisters: The Yellow Panties of Happiness

Akira and Masa are fledgling comic storytellers. Living together in a small apartment with no bathroom, they audition daily. At an audition one day, a duo already active on TV is in the middle of rehearsals. As Akira and Maza eagerly watch the duo, hoping to steal a few tricks, an ambiguous atmosphere develops that develops into something more.

At the public bath that Kazuko inherited from her predecessor, customers of all ages come to see Kazuko's huge breasts. Everyone dreams of being sandwiched between her breasts one day. But then a sports gym with a spa opens nearby, and the number of customers starts to decline.

A man returned to his home in Kyoto after being away for a year. As he works as a part-timer in Tokyo, his sister decides to sell their childhood home since both of their parents have passed away. One night, he recalls his father’s favorite watch and looks for it, and he stumbles across a notebook titled “My Memories.” He starts to read it and sees the words written on the first page saying “The men I loved, and who passed me by…” and is followed by a record of his father’s love life.

A female assassin has a special gift. While receiving a secret mission, that will require her special skill, she embarks on a very dangerous mission that forces her to encounter many dangerous enemies.

Nurse Rio starts working as a dispatch nurse with her colleagues Wakaba and Midori...

Momoko is nervous but enthusiastic about joining the movie company she has longed for. However, she was late from the first day and was struck by Reiko, a female employee who is famous for her talent. On the other hand, the president liked Momoko and took care of it. But it was an adult filmmaking company! Although she was worried about the gap with the company she had envisioned, she was excited to have her seniors teach her work, and she was further exposed to the passion of the people involved and grew up every day.

Yoshinaga, a doctor of psychology, is immersed in writing a book, and as he conducts research using his wife, Emiko, as a test subject, he discovers that Emiko has the potential to be a sadist. the next day. After reporting last night's induced pleasure act to Yoshinaga's good partner, associate professor Muraki, he later assigned Muraki's ex-girlfriend, Hitomi, as Yoshinaga's full-time secretary in order to repair their marital relationship. Meanwhile, Shoko, a fourth-year university student, comes to visit Yoshinaga to ask him to do something about her not being able to meet the deadline for her report...

Izumi Yasuura, who came to a port town, started working at a snack run by Mako. Izumi's mild personality and cute appearance make him a popular figure among florist Shoichi and regular customers. One evening, Izumi meets Mikio, who plays a folk guitar alone at the foot of the bridge. Eventually they fell in love and started living together. However, a few years later, Mikio transformed into a thug and became a string of springs ...

Kohei Hayasaka's lover, Kohei, died in a disaster several years ago. Hikari leaves Kohei's room as it was, prepares food on the anniversary of his death, carefully cleans his body in the bath, has flirting sex with the phantom Kohei in a naked apron like a newlywed ... and wakes up from that dream. He returned to the everyday world and was silently doing his job at the fishery cooperative.

Takuya, a virgin, is shocked when his girlfriend Kyoko calls his penis "cute" and he stops having sex for the first time. One day, Takuya is invited by his university senior, Nishikawa, to go on a road trip.

Office worker Misako lives with her boyfriend Ken. As they near their goal of raising money for their wedding, the couple find themselves in a slump. One day, Misako receives news of a class reunion. She had a crush on her high school teacher, Shima Masayuki, and when she meets him again at the after-party, they begin a relationship.

Aoi (Miri Mizuki), a new wife, married Kitajima, the brother of Sayaka (Mai Tamaki), a former colleague at work, and the president of a venture company. Aoi, who was a mediocre office lady, was excited to have sex with her energetic husband who asked for it every night, but she secretly hated sex because of the trauma she received during her adolescence. One day, Aoi had a problem with his neighbor Yoshie (Rin Ogawa) about how to put out the trash, but on the contrary, he was invited to a meal. And Aoi, who suddenly got drunk while enjoying Yoshie's cooking, fell asleep...

At the quiet Sirius Theater in the countryside, struggling filmmaker Fukuyama works amid mounting debts while nurturing his passion for film. The theater’s owner, Inuzuka—fearing impending blindness—sees Fukuyama as his potential successor. Meanwhile, unspoken affections complicate matters when long-time admirer Tamaki and the mysterious film star Hitomi (later revealed as Ayame Nakanishi) enter the picture, intertwining their fates in unexpected ways.

Yuma, a trading company employee, is busy with work and has been drifting apart from his fiancee Yoko. His childhood friend and junior colleague Atsushi, who regards Yuma as an older brother, is gay. But Yuma doesn't know this. One day, Atsushi invites Yuma to a summer festival. Drunk, Yuma stays at Atsushi's apartment. Atsushi's gaze falls on the lower half of Yuma's body, as he sleeps defenselessly in his yukata robes. He instinctively reaches out to touch it. At that moment, Yuma senses something is wrong and wakes up. Upset to find out that Atsushi is gay, Yuma goes home. The next day, as Atsushi is apologizing to Yuma for the night before, thunder rumbles! Before he knows it, their bodies have been swapped. Atsushi, in Yuma's form, checks out the lower half of his brother, whom he admires, and is entranced on the spot. Yuma, in Atsushi's body, goes pale. The two are forced to live like this for a while...

Erika works at a popular "reconciliation agency." Her main job is to help separated couples remarry or get back together. She approaches her target, blends into their life, and gradually makes them remember their ex... with a 100% success rate. However, when the client's husband turns out to be a senior colleague Erika admired, personal feelings get involved...

After graduating from university, Fujiko finds employment at an advertising agency. She is assigned to the sales department, where she works as a subordinate to Masumura, an elite salesman with a promising future, who is married to the company president's daughter. The two eventually become close and start a relationship. While she is happy to have such a handsome boyfriend, her position as his mistress makes her feel unstable. One day she have sex with Masumura in the office, but she is caught in the act by Sachi, who competes with Masumura for the top spot...