Engaged to the Unidentified
Engaged to the Unidentified

Engaged to the Unidentified

Just an ordinary teenager, Kobeni Yonomori receives quite the surprise on her 16th birthday—a fiancé and a sister-in-law she never even knew she had. As a result of an arrangement that her late grandfather made, Hakuya Mitsumine and his younger sister Mashiro have moved from their countryside home to the Yonomori household in order to deepen their relationship with their new family members. This story follows Kobeni's "love life" with Hakuya as she tries her best to adjust to the abrupt changes forced upon her. However, as some extraordinary secrets regarding the siblings come to light, Kobeni will find her life changed forever.

Just an ordinary teenager, Kobeni Yonomori receives quite the surprise on her 16th birthday—a fiancé and a sister-in-law she never even knew she had. As a result of an arrangement that her late grandfather made, Hakuya Mitsumine and his younger sister Mashiro have moved from their countryside home to the Yonomori household in order to deepen their relationship with their new family members. This story follows Kobeni's "love life" with Hakuya as she tries her best to adjust to the abrupt changes forced upon her. However, as some extraordinary secrets regarding the siblings come to light, Kobeni will find her life changed forever.

Watch Free Now

Seasons & Episodes

EP 1

First Impressions are Everything

Kobeni Yonomori, who has just turned sixteen, is shocked to learn she has a fiancée named Hakuya Mitsumine who, along w

EP 2

A Loli Sister-in-Law Isn't All That Bad

As Mashiro tries to come to grips with Benio's popularity at school, Kobeni continues to try and remember about Hakuya.

EP 3

I Can Feel the RomCom Waves

Whilst Benio finally gets Mashiro to come to the student council room for tea, Kobeni goes with Hakuya to buy some ingre

EP 4

She's Just a Pervert

The morning after learning about Hakuya, Kobeni ends up with a fever due to her weak body. As Benio informs Mashiro and

EP 5

This Woman Has Given Birth?

Kobeni learns about a member of the Mitsumine family coming over, along with the fact that Mashiro is nine years old. Wh

EP 6

I Know! I'll Fill It with a Sister-in-law

Kobeni's mother, Akane, who had always known the Mitsumines weren't human, tells Kobeni that she is no less thankful to

EP 7

That is That, and This is This

Student Council secretary Konoha Suetsugi feels some hostility towards Kobeni and Mashiro because of their closeness to

EP 8

Only a Sister can Heal a Scar Left by a Sister

As Kobeni decides to keep Konoha's true identity a secret from Benio, Niko continues to investigate her, despite warning

EP 9

How Humiliating, I'm So Embarrassed!

As Mashiro informs Konoha about Kobeni and Hakuya's engagement, Hakuya chases after Kobeni, assuring her that he is alre

EP 10

Looking Up the Term ''Lovey-Dovey Phase''

Benio seems to grow colder towards Hakuya, who seems a bit downhearted when Kobeni denies confessing. Meanwhile, Kobeni

EP 11

Enjoying the Handkerchief

Hakuya is troubled over what gift he should get for Kobeni to make up for White Day. Meanwhile, Mashiro is almost spotte

EP 12

Do You Get It? I Get It.

As Kobeni worries about Hakuya and Mashiro, the only clue she has being a text saying they had gone back to the mountain

Popular Cast