Yuka Iguchi as Little Sister ( е¦№гЃЎг‚ѓг‚“, ImЕЌto-chan), Ai-chan's younger sister who now studies at Ai-chan's high school as first year student.

Tokumori ( еѕіжЈ®гЃ•г‚“, Tokumori-san), a worker at a minimarket.

RyЕ«nosuke Watanuki as Male Dentist ( з”·жЂ§жЇз§‘еЊ»её«, Dansei shika ishi).

Minami Shinoda as Dentist Assistant ( жЇз§‘еЉ©ж‰‹, Shika joshu).

Mamiko Noto as Dentist ( жЇз§‘иЎ›з”џеЈ«гЃ•г‚“, Shika eiseishi-san).

Lynn as Female employee ( еҐіжЂ§з¤ѕе“Ў, Josei shain).

YЕЌ Taichi as School Nurse ( дїќеЃҐе®¤гЃ®е…€з”џ, Hoken-shitsu no Sensei).

KЕЌichi SЕЌma as Chief Manager ( иЄІй•·, KachЕЌ), Salaryman's boss.

Trainer ( гѓ€гѓ¬гѓјгѓЉгѓјгЃ•г‚“, TorД“nДЃ-san) Voiced by: Minami Tsuda A gym trainer who occasionally accompanies Chief Manager at the gym. Baseball Club Member ( й‡ЋзђѓйѓЁ, YakyЕ«-bu) Voiced by: Taito Ban The childhood friend of Cheerleader who became conscious of her after he learned the differences between boys and girls. Cheerleader ( гѓЃг‚ўгѓЄгѓјгѓЂгѓјгЃЎг‚ѓг‚“, ChiarД«dДЃ-chan) Voiced by: Marika Kouno A high school cheerleader who instantly becomes popular and become a model after she gets featured in media due to her body. He and Maegami are now living together, coincidentally next to Senior's house. He finally revealed his true feelings after she came back to him even after her graduation. Teacher ( е…€з”џ, Sensei) Voiced by: Jun'ichi Yanagita A male teacher who Maegami has liked since her first year of high school and who was having trouble accepting her love confession due to school rules. She is Salaryman's niece and often teases Ai-chan about her breasts and at the same time, is very protective of her. Volley club member ( гѓђгѓ¬гѓјйѓЁгЃЎг‚ѓг‚“, BarД“-bu-chan) Voiced by: Shizuka Ishigami Ai's best friend, who is popular with both boys and girls. She refers to Teacher as Sensei when she calls him. He's keeping a cat named 'Fumi-chan.' Maegami ( е‰Ќй«ЄгЃЎг‚ѓг‚“, Maegami-chan) Voiced by: Rie Takahashi A graduated high school girl who's now lives with Teacher in his apartment after her feelings were finally reciprocated by him since her love confession on first year.

He's the one who's taking care of Junior when she gets out of control with her alcohol. Senior ( е…€иј©, Senpai) Voiced by: Yasuaki Takumi Junior's senior at trading company. Junior loves cats and often come to Senior's house as he's keeping a cat. Junior ( еѕЊиј©гЃЎг‚ѓг‚“, KЕЌhai-chan) Voiced by: Ai Kayano A clumsy, but reliable office woman. His niece is coincidentally Ai's best friend. Every week, Ai gives him a weekly charm, which are mostly buttons popped off from her shirts. Salaryman ( гЃЉе…„гЃ•г‚“, Onii-san, Older Brother) Voiced by: Junji Majima A salaryman who 'protects' Ai from the crowded train every Monday morning. However, recently the size seems to be getting even bigger. Her nickname comes from the fact that her breast size is I cup. That is when she met the salaryman who protects her from the crowds and helped her gaining more confidence in her own body. Because of her duty as the class president, she has to come to school earlier than everyone else every Monday, and has to ride the train during its rush hour. She used to suffer from low self-esteem as her breasts attract attention from men around her and has been trying to hide them. The second volume was released at Comic Market 90 and the third volume was released at Comic Market 91, all has been published by Himura himself.Д¬haracters Ai ( г‚ўг‚¤гЃЎг‚ѓг‚“, Ai-chan) Voiced by: Sayaka Harada Ai is a high school student who, despite being slender, has big breasts. So far, the first volume illustration compilation book that also includes comic was released on December 31, 2015, at Comic Market 89.

Besides Ai, the stories of other various girls and men are also illustrated every Monday.

The initial purpose of these illustrations was to provide a positive motivation towards workers and students alike on Monday mornings, as the role of students and workers are reflected through the characters Ai and the salaryman, respectively. These illustrations are colored in a blue monochrome theme. This project was initially called GetsuyЕЌ Asa no Shachiku Shokei ni Tawawa o Otodokeshimasu ( жњ€ж›њжњќгЃ®з¤ѕз•њи«ёе…„гЃ«гЃџг‚Џг‚Џг‚’гЃЉе±ЉгЃ‘гЃ—гЃѕгЃ™, 'I shall offer tawawa to our brothers in corporate slavery on Monday mornings') before Himura give its current name after the 46th illustration, and has since posted more than 200 illustrations. They meet every Monday on the train where they chat and the salaryman serves as her chaperone during the crowded commute. The story revolves around an ample-breasted high school student named Ai who has a chance meeting with a salaryman on a train and they strike up a friendship.

Tawawa on monday tewitter