NHK ni Youkoso!, Again!! Recommendations
Both manga attempt to show the struggles of a shy, unpopular and socially excluded protaganist and how they try to make adjustments to their life by changing the way they mentally approach the world. Again!! is less sensationalised and doesn't really try to play up that it's delving into psychology but rather just gets the job done in a realistic manner. NHK has a less continuity to the characterisation, and I'd say it also has a more stereotypical unpopular main character who is genuinely a bit of a prick, whereas Imamura in Again!! is a genuinely nice person underneath it all.
Overall if you liked