0: Mysterious Girlfriend X

Mysterious Girlfriend X

Mysterious Bond

Mysterious Photograph

Mysterious Picture

Mysterious Test Tube

Mysterious Day When the Wind was Strong

Mysterious Outdoor Pool

Mysterious Summer Vacation

Mysterious Girl Meets Mysterious Girl

Mysterious Girl Meets Mysterious Girl (continued)

Mysterious Sign

Mysterious Wonder Drug

Mysterious Arousal

Mysterious Memory

Mysterious Dessert

Mysterious Rain Shelter

Mysterious Step Up

Mysterious Sea Bathing

Mysterious Athletic Festival

Mysterious Exam Study

Mysterious Big Sister

Mysterious Sensation

20.5 Mysterious Feeling

Mysterious Response

Mysterious "For Some Reason, that Kind Of..."

Mysterious Idol

Mysterious Moment

Mysterious Souvenir

Mysterious Summer Greetings

Mysterious Adventure

Mysterious Letter of Challenge

Mysterious Cultural Festival - The Night Before

Mysterious Cultural Festival (Part 1)

Mysterious Cultural Festival (Part 2)

Mysterious Cultural Festival (Part 3)

Mysterious Cultural Festival (After Party)

Mysterious Delusion (Part 1)

Mysterious Delusion (Part 2)

Mysterious "Old Man Transformation" Phenomenon

Mysterious High Kick

Mysterious Plan

Unison

Mysterious Letters

Mysterious Experiment

Mysterious Experiment Results

Mysterious Tremble

Mysterious Choice

Mysterious Switch

Mysterious Live Concert

Mysterious Pair

Special: Idol Arc Epilogue

Mysterious Carnivorous Girl (Part 1)

Mysterious Carnivorous Girl (Part 2)

Mysterious Narrowed, Angry Eyes vs. Gentle, Soothing Eyes (Part 1)

Mysterious Narrowed, Angry Eyes vs. Gentle, Soothing Eyes (Part 2)

Mysterious Girlfriend X Robo

Mysterious Cold

Mysterious "Male Dream"

Mysterious Petal

Mysterious Twinge

Mysterious Summer Uniform

Mysterious Swim Meet (Part 1)

Mysterious Swim Meet (Part 2)

The Mysterious Last Day of July

The Mysterious Anime Adaptation

Mysterious Substitute

The Mysterious Movie Production (Part 1)

The Mysterious Movie Production (Part 2)

The Mysterious Movie Production (Part 3)

The Mysterious Movie Production (Part 4)

The Mysterious Movie Production (Part 5)

The Mysterious Movie Production (Part 6)

The Mysterious Movie Production (Part 7)

The Mysterious Movie Screening (Part 1)

The Mysterious Movie Screening (Part 2)

The Mysterious Mole

The Mysterious Fruit

The Mysterious Christmas

The Mysterious New Year's Card

The Mysterious Valentine

The Mysterious White Day

The Mysterious Softball Game

The Mysterious One-Piece

The Mysterious Poolside

Mysterious Fireworks

The Mysterious Backstory

The Mysterious Tennis Court

Mysterious Shutter Chance (Part 1)

The Mysterious Match - Tsubaki vs. Urabe

The Mysterious Snowfall

Mysterious Shutter Chance (Part 2)

Mysterious Cologne

The Mysterious "Period of Getting Bored with Each Other"

Mikoto Urabe is a new transfer student in Akira Tsubaki’s high school class. One day, Akira happens to find Mikoto passed out asleep on her desk after classes have ended. He wakes her and tells her it’s time to go home, and discovers that she has drooled on her desk. He spontaneously reaches out to touch and taste it… and then things start getting really strange.
 
In this surprising and sweet twist on a high school romance story, boy meets girl and they learn about each other’s inner life through their highly unusual bond, and Akira learns to respect Mikoto as she sets a careful pace in the development of their relationship.
 
(Source: Kodansha USA)
 
Note: Includes the original one-shot and 8 extra chapters.