Another one of my favourite anime series. This one focuses on the life of Rito Yuki who one day finds a gorgeous nude girl (who turns out to be an alien from the planet Deviluke) in his bathtub and accidentally becomes engaged to her by her planet’s traditions. She insists on living with him which causes him no end of problems, even without an insane assassin trying to kill him and Lala’s father’s challenges to his manliness.
There are multiple episodes in both OAV series, where Rito is transformed into his female counterpart Riko by Lala’s ridiculous inventions. The first occurance is in Episode 1 of the first OAV where Lala discovers the love men have for boobs, and so constructs a missle (I know right!) called Pai-Pai Rocket- Kun that will make her breasts the perfect size. Unfortunately it misfires and hits Rito in another part of the school, causing him to change genders and become Riko. There are many fun moments throughout the episode where Riko struggles with the embarrassment of his new body, including a couple of bath/shower scenes, until Lala shows up with a new invention called Change Boy Girl-Kun, a gun that can switch a person’s gender, and changes him back into a boy though at a rather awkward moment.
In Episode 3 of Motto To Love-Ru -Trouble, the second TV series, Rito in changed into a girl again. The first time Rito transformed into a girl, his friend Saruyama fell in love with him, not realising that this girl was actually Rito. Lala sets up a date between Saruyama and Rito’s female counterpart and transforms him into a girl again using Change Boy Girl-Kun.
At the end of To Love-Ru Darkness Episode 5, and carrying on into Episode 6, Lala changes Rito into a girl again to demonstrate her Change Boy Girl-Kun to her friends. You would have though Rito would be getting used to being changed into a girl but he still finds the situation as awkward as ever! This is the most ecchi series so far and the end of Episode 5 has Riko examining her naked body in a full length mirror, then at the start of Episode 6 he is being groped naked on his bed by two other girls from Deviluke before transforming back to his male self. Oh, and there is an uncensored version out as well. 😉
There is also a secondary character call Ren/Run who is an alien from another planet. His/her species changes gender but when they do they become a completely different person. Ren wants to be the most manly of men, whereas Run is a girl idol. The gender swap occurs in multiple episodes thoughout all the series.
In To Love Ru Darkness OAV Episode 1 we have a different kind of gender swap. This time Rito and Haruna accidentally swap bodies due to another one of Lala’s inventions. They found out they would swap back automatically that evening and all was going well (besides and awkward toilet break) until Rito (in Haruna’s body) got covered in mayonnaise and so they reluctantly decided to have a shower together.
To Love Ru OAV Episode 1
Motto To Love Ru Trouble OAV Episode 3
To Love Ru Darkness Episode 5
To Love Ru Darkness Episode 6
To Love Ru Darkness OAV Episode 3