Multiplication ~From the Front and From Behind~

Bangaihen: Multiplication ~From the Front and From Behind~ is a 23rd Bangaihen and 1st bonus chapter released after Chapter 77 of To LOVE-Ru Darkness manga.

Summary
The chapter begins with Lala inventing something in her room. Mikan asks her to take a bath but sees her inventing something special.

The next day at school, Nemesis uses the Principal as a chair and is shown reading a magazine when Yui and Nana show up. Yui forbids Nemesis for such violations, but Nemesis says that he is enjoying being a chair. Indeed The Principal says that it's ok to be scolded by any student and ordered by any girl. In the meantime, Yami and Mea show up eating taiyaki and lollipops. Mea says to Nemesis that she is a student at the school now so she should be responsible. After a small conversation they begin to fight for a warm up exercise because they believe that they will get weak if they don't exercise. Yami gets angry being neglected and joins in. Kotegawa and Nana beg them to stop fighting in the school grounds as it's a violation of school morals.

Meanwhile in the school, Haruna is carrying some books to place on a shelf. Rito arrives and helps her. Haruna looks happy that Rito helped him and says that he is kind. While talking they are interrupted when Lala arrives and shows her invention named Nyan Nyan Copy-Kun, a cat robot that can make a clone of anything that touches it and explain that Mikado requested it to make copies of her medical plants. Haruna ask why it look like a cat and Lala says so it look cute, but its still incomplete.

Haruna then accidentally trips over Rito's leg making him to fell onto Lala'chest and the robot receiving an electric shock. The cat run away and the girls check if Rito is ok. Peke is worried because the Nyan Nyan is actived, but lala says she doesn' see anything happened to Rito' body. Just then Momo appears and tells that she saw her big sister invention going that way. Suddenly Rito sneezes getting a clone of himself. The two Ritos then fall on Sairenji in a suggestive pose with one grabs her boobies lifting her shirt and other under her skirt. Both Ritos get up, apologizing.

The two Rito asks what the cure is for such an incident. Lala says if the tail of robot is squeezed the effect will finish. They try to grab it but it runs away from them and Rito sneezes again resulting in another clone of himself. Rito understand he will multiply again.

Anime
Part 1 and Part 2 are adapted in the tenth OVA of To LOVE-Ru Darkness anime.

Trivia

 * The manga Nemesis is reading is Jump Square issue where is published the last issue of To Love-Ru Darkness.
 * Lala said that she made the copy robot look like a cat because it's cute, but this might be a pun on the term "copycat".
 * Rito and Sairenji are shown in a nice mood without hesitation.
 * The story has been later reprinted in the To Love-Ru Chronicle: To Love-Ru 10th Anniversary Book and in the volume 10 of To Love-Ru Darkness (Bunko Edition).