Itsuki and Mahiru performed their first Love Ritual. A "Star Child" that will be able to cleanse the Impurity was born, as they bonded through physical contact. Later, they were transferred to "Hoshigami Academy," where the "maidens of the 12 constellations," who will perform the Love Rituals with Itsuki, were gathered. Itsuki starts to bond with one of the maidens, Ruka, at the cherry blossom viewing welcome party.
I did read the book to learn 
the etiquette, but...
...قرأت الكتاب لتعلّم قواعد السّلوك، لكن
Ich hab sicherheitshalber ein Buch
gelesen und mir die Etikette eingeprägt.
Leí un libro para aprender la etiqueta…
Leí un libro para aprender la etiqueta…
J’ai appris quelques trucs
dans un livre…
Ho letto il libro e ho imparato come comportarmi, ma...
Eu li um livro para aprender as maneiras...
Я прочитал книгу, чтобы узнать, 
что нужно делать...