archytele The Vault
Season guide

Sister Princess: Season 1

26 episodes Premiered Apr 4, 2001 Updated Oct 2, 2026
Advertisement
Season 1 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 1 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

Time Saved 0.4h Skipping 1 filler episode
12%
85%
Mytharc (3): Crucial lore & season climaxes
Core (22): Character development & subplots
Side Quest (1): Standalone / filler
S1·E1 Mytharc

My Graduation

Apr 4, 2001 · 23 min

Wataru Minakami is sent away from home to Promised Island to attend high school there. He falls off the ferry and almost drowns, but he's saved by a girl who calls him "Big Brother

S1·E2 Core

Onii-chan, We Love You!

Apr 11, 2001 · 23 min

As Wataru gets used to life in the mansion, many mysteries await him. There's a blistering-hot kimchi gratin no one remembers cooking. Then, he encounters a monster out in the wood

S1·E3 Core

Together with Onii-sama

Apr 18, 2001 · 23 min

Wataru goes to school for the first time. During class, he fends off all his sisters vying for his attention... and has to do the same thing again at home! Tired of it all, he atte

S1·E4 Core

Where's the Teddy?

Apr 25, 2001 · 23 min

Hinako, the youngest of the sisters, is missing! She left a note that she's "going to look for Mr. Teddy Bear." Kaho asks Wataru to go look for her, and it ends up being quite an a

S1·E5 Core

Mail with Aniki

May 2, 2001 · 23 min

Hinako sees Wataru using his PC and decides she wants to send him an E-mail. All his other sisters join in, sending him updates on what's going on in their lives. But who is his my

S1·E6 Core

Onii-chan, the Prince

May 9, 2001 · 23 min

Hoping to win a mysterious prize, the family decides to perform a play together. Wataru naturally ends up in a starring role as the prince. Then he has to decide which sleeping bea

S1·E7 Core

Season to Love

May 16, 2001 · 23 min

The wind blows a sheet onto Sakuya, and Hinako tells her she looks like a bride. One thing leads to another, and all of Wataru's sisters end up making wedding dresses and staging a

S1·E8 Core

Someday with the Two of Us

May 23, 2001 · 23 min

Wataru goes to a bookstore, and the shy, frail Maria and her loyal dog Michael accompany him. They have a pleasant time in town together... but then the rain starts pouring and Mar

S1·E9 Core

Summer Came

May 30, 2001 · 23 min

Summer has arrived at last! Wataru and the girls enjoy cold somen noodles, try on new swimsuits, and finally play in the mansion's pool.

S1·E10 Core

Do your Best, Anii!

Jun 6, 2001 · 23 min

The bright summer days continue, and Wataru decides to learn how to swim. The athletic Mamoru takes the lead in teaching him. Can he overcome his lack of talent?

S1·E11 Core

A Secret Tour with Aniki

Jun 13, 2001 · 23 min

The family goes on a trip, which turns out to be on Rin Rin's submarine! Wataru has a great time with all of them, but then disaster strikes...

S1·E12 Filler

Vacation is Love

Jun 20, 2001 · 23 min

Wataru, his sisters, and Mami are stranded on a desert island! They fashion new clothes and continue enjoying themselves. But the island has a secret!

S1·E13 Core

Summer with Onii-chan

Jun 27, 2001 · 23 min

While writing a letter to his friend Akio, Wataru reminisces about his summer vacation and the time he spent with each one of his sisters.

S1·E14 Core

My True Feelings

Jul 4, 2001 · 23 min

Wataru goes shopping in town with Karen. They have a pleasant day, but then Karen gets lost in the rain while trying to reunite two kittens! Can Wataru find her again?

S1·E15 Core

Aria's Ribbon

Jul 11, 2001 · 23 min

Aria's ribbon gets blown away by the wind, and she goes to look for it in town, accompanied by a mysterious old man. Then Wataru goes to look for her as well when he notices her mi

S1·E16 Core

Kaho does her Best!

Jul 18, 2001 · 23 min

Kaho, the cheerleader, is excited to cheer for her brother at the sports festival. But she gets depressed at her own clumsiness. Wataru will have to give her courage!

S1·E17 Core

It's Honorable... *Poh*

Jul 25, 2001 · 23 min

While in town with Haruka, Wataru has an escalator accident and sprains his ankle! Will this interfere with their dream of going to the dance together?

S1·E18 Core

Eternal... Vow...

Aug 1, 2001 · 23 min

Wataru has a strange dream, and wakes up as an invisible ghost! Can the occultist among his sisters, Chikage, return him to his body... or is she the one behind this?

S1·E19 Core

It's a Lunch of Love

Aug 8, 2001 · 23 min

Shirayuki brings Wataru a boxed lunch at school. Then she cooks more and more, until Wataru's stuffed full! He'll have to find a way to turn down her meals without hurting her feel

S1·E20 Core

Christmas Love Destiny

Aug 15, 2001 · 23 min

Christmas is coming! Everyone has fun decorating the mansion and choosing presents. Wataru's holy night with his sisters will be truly magical.

S1·E21 Core

Me Two (^o^) / to Aniki

Aug 22, 2001 · 23 min

Rin Rin builds a mechanical copy of herself to help take care of Wataru, but Mecha Rin Rin keeps breaking down. Wataru gives her what help and reassurance he can.

S1·E22 Core

Ani-chama, It's Cheki!

Aug 29, 2001 · 23 min

All sorts of things are going missing around the mansion! Yotsuba, girl detective, is determined to find the culprit. But what if it's one of them?

S1·E23 Core

First Guest

Sep 5, 2001 · 23 min

Wataru's old friend Akio comes to visit Promised Island! All his sisters are excited to meet their guest. Except for Mami...

S1·E24 Core

Premonition of Good Bye

Sep 12, 2001 · 23 min

Wataru finally has the chance to return to Tokyo, but he struggles with the decision. One by one, his sisters find out that he might leave...

S1·E25 Mytharc

I Want to See You... Onii-chan

Sep 19, 2001 · 23 min

The sisters try to get used to life without Wataru. And back in Tokyo, Wataru tries to get used to life without them...

S1·E26 Mytharc

The Promised Island

Sep 26, 2001 · 22 min

After being challenged by Mami, Wataru makes his decision. He returns to live happily with his sisters once again.

Advertisement
Advertisement