A collection of twitter published manga by Kawasaki Tadataka, they're described as "short, ecchi" comedy. Four volumes and counting, they're all available in the Japanese Amazon site for FREE as Kindle e-book.Volume 1:1) Marie to Natsu no Umi (マリエと夏の海 , Marie and the Summer Sea)2) Tonkagya-san de no Manner (とんかっ屋さんでのマナー , Etiquette at a Tonkatsu Restaurant)3) 〇〇 nao Nee-san (〇〇なお姉さん , 〇〇 Big Sister)4) 〇〇 na Present (〇〇なプレゼント , 〇〇 Present)5) Himitsu no Are (秘密のアレ , That's a Secret)6) Tatoerunara (例えるなら , For Example)7) Succubus Moriko-chan (1) (サキュバス モリ子ちゃん)8) Succubus Moriko-chan (2) (サキュバス モリ子ちゃん)9) Koushoujin Mashike Masaomi (交渉人 増毛正臣 , The Negotiator, Masaomi Mashike)10) Pierce no Okayama-san (1) (ピアスの岡山さん , Pierced Okayama-san)11) Pierce no Okayama-san (2) (ピアスの岡山さん , Pierced Okayama-san)12) Ichiko to Maya (イチコとマヤ , Ichiko and Maya)13) Toshishita no Otokonoko ni Are Shichau Hanashi (年下の男の子にアレしちゃう話 , Falling in Love with a Younger Boy)14) Otsupai Undermining Kouka (おつぱいアンダーマイニング効果 , The Boob Undermining Effect)15) Katei Kyoushi no JK ga Usugi (家庭教師のJKが薄着 , The High School Private Tutor is Dressed Lightly)16) Chuu-2 Danshi no Nichijou (中2男子の日常 , Daily Life of a Junior High School Second Year Student)17) Fumio to Masashi (フ三オとマサシ , Fumio and Masashi)18) Bouken Otomesan A-chan (冒険乙女三アちゃん , Adventure Maiden Mia-chan)19) Serizawa-san no Houkago (芹沢さんの放課後 , After School with Serizawa-san)Volume 2:1) Battle Manga Couple Niari-Gachina Asa no Koukei (バトル漫画カップルにありがちな朝の光景 , Morning Routine of Couples in Action Manga)2) Enkaku no Are (遠隔のアレ , Remote That)3) Tensai Planner Kyouko (天才プランナー京子 , Genius Player Kyouko)4) Valentine Hunter Matsuzaki (バレンタインハンター松崎)5) Are no Namae (アレの名前 , The Name of That)6) Awanai Futari (あわないふたり)7) Itsudemo Dokodemo Hata-chan (いつでもどこでも八田ちゃん , Anytime and Anywhere, Hatta-chan)8) Do Seiso Moeri-chan (ド清楚もえりちゃん , Super Tidy Moeri-chan)9) Isekai Janakute Iikara Kouiu Kankyou ni Tensei Shitai dake no Manga (異世界じゃなくていいからこういう環境に転生したいだけの漫画 , It's Fine if it isn't an Isekai, I Just Want to be Reborn in an Environment Like This)10) Himetaru Omoi (秘めたる想い , Hidden Thoughts)11) Asa no Misaki-senpai (朝の美咲先輩 , Miki-senpai in the Morning)12) Okayama-san no Himitsu (岡山さんの秘密 , Okayama-san's Secret)13) Jiman no Kanojo (自慢の彼女 , The Girlfriend I'm Proud Of)14) Kanashibari no Jutsu (金縛りの術 , Kanashibari Technique)15) Aruhara Kara Hajimaru Are (アルハラから始まるアレ , That, Started After Drink Pushing)16) Himetaru Omoi (秘めたる想い , Hidden Love)17) Okaasan no Toutta Koukou (お母さんの通った高校 , The High School Mom Went To)18) Tada ni Bou Gu (多田に棒ぐ , An Oddering to Tada)19) Sakusha no Toaru Yoru no Nikki (作者のとある夜の日記 , The Creator's Journal Entry of a Certain Night)"