Combini de Kimi to no 5-funkan. - Vol. 5 Ch. 77.5

[Magnus_Prime]

Shibasaki's in good company:
https://mangadex.org/chapter/ac4e52a4-9609-4489-83cb-778b2ed11a39/5

 

[Showman26]

Bro really smiles in Right Angle Triangle 📐

 

[andrybak]

The doodle in the top left corner is a drawing of 相合傘 (aiaigasa): "an umbrella or parasol shared by two people, which alludes to a romantic situation" and "a simplistic doodle of an umbrella, usually topped with a heart, with the names of two people who are said to be in love written on either side of its handle".

The thing in the bottom right corner is students complaining that school takes too long and they want to go home. The arrows show that two different students agree with the original writer, so there are three of them in total.