Gacha Gacha

Do not confuse with Gaccha Gacha.
Lately, Kouhei can’t get his friend Kurara out of his mind. Even though he has known her since elementary school, all of a sudden, ever since she came back from summer vacation, he has been crushing on her . . . hard.
But something is different about Kurara-she’s acting very oddly. Sometimes she seems wholesome, pure, and innocent, and at other times she is extremely forward and unabashed. Kouhei soon learns that Kurara has multiple personalities-and decides to help her keep her secret from their classmates. But Kouhei finds himself struggling between helping Kurara as a friend and trying to win her heart . . . which is a challenge, since she has many!
Volumes 1-5 are the first story arc. Starting from volume 6, a whole new set of characters take the story off in another direction. Because of this, the chapter numbers were restarted back to 1 for the first chapter of volume 6.
From Taruby:
There are two stories, “Capsule” and “Secret”, so far in the GachaGacha series. This summary is about the 6 volumes of the”Secret” story arc.
Hatsushiba Akira, an awkward senior highschool boy, has a strong crush on classmate Sakuraba Yurika. But when he gets close to her he always says or does something stupid.
At the suggestion of his best friend, Kikuchi, Akira enters the GachaGacha machine to play a game, but the machine fritzes out and malfunctions. That night he sneezes while going to bed, and when he wakes up he looks like the female avatar he saw in the GachaX2. He soon learns that sneezing will change him back and forth from his normal self to a female form. As a girl, Akira-chan is able to get close to Sakuraba and become her friend.